Haruka takes Nao on a date again, but he cannot shake the sight of Sora masturbating that night off from his mind. Eventually Haruka hits his limit and tries to get rid of those thoughts by taking Nao to a hotel, but she rejects his act and asks if he really loves her. Haruka is unable to answer and returns home. Soon after, Sora gets a fever and Haruka stays home to take care of her. That evening, Sora, with her fever subsided, confesses her feelings to Haruka and the two make love, beginning a relationship. This did not go unnoticed, as everyone, especially Kozue and Nao, begins to see the twins spend more and more time with each other. One afternoon, when Kozue and Nao decide to visit the Kasugano residence, they catch the twins in the middle of making love.

This episode replays to the event where Haruka is trying to talk to Sora about his relationship with Nao, but this time Sora is always at the back of his mind, since, lately, she seems not to accept Nao, and that she seems to be teasing him. Haruka suggests a date with Nao, but cannot get to tell Sora about it, even disguising it as if he will be spending time with Ryouhei. During the date, though, Nao notices that Sora is never far from Haruka’s mind, him buying things for his sister rather than for her, and eventually spoiling their date. They plan to make croquette curry upon arriving home, but is canceled when Haruka finds Sora not feeling well in her room after having a bad dream. The next day Nao notices that Haruka tries to hide his date with her from Sora, but she just went along. One night, Haruka catches Sora masturbating in her room while mentioning his name, much to his dismay—she is enamored with him ever since that one summer day in their childhood when Haruka kissed Sora while playing.

Sora decides to follow everyone at the beach, but at the moment she got off the bus, news that a young man was rescued from drowning unconscious. As Sora looks over, she finds out that the boy in question is Haruka. However, Nao acted quickly and performed mouth-to-mouth resuscitation. With that event, Sora becomes even more insecure, eventually telling Haruka not to leave home and tells all sorts of excuses just to make him stay. One day, Sora made Haruka choose between her and Nao, but he just shrugs it off and proceeds to school with Nao as if nothing is wrong. That afternoon Haruka finds Sora missing after receiving a text from her saying “Let’s leave here.” Akira, Kazuha, and Ryouhei joins Nao and Haruka in search of her, until, amidst the rain, Nao finds Sora at the bus stop. Refusing to go with Nao, Sora runs out of the bus stop, angrily telling her that she is the reason why Haruka has changed. Suddenly, a bolt of lightning strikes the bus stop and burst into flames. Sora then remembers she forgot her stuffed bunny inside. Nao rushes in to retrieve the only memento Sora has of her mother, causing her to be nearly trapped inside. After receiving the rescued item, Sora reveals to Nao her insecurities with her, that she is afraid Haruka would leave her alone. The next night, Sora joins everyone during the Summer Festival at the shrine. This time, Sora is more receptive of Nao.

By now Sora is showing her hatred of Nao in the open, even in front of Ryohei and Nao herself. One afternoon Sora, attracted by the smell of curry cooking in the kitchen, catches Haruka and Nao making love in the living room. Sora throws Nao out of the house, warning her not to see Haruka ever again, since it is the second time she catches the two doing the “dirty deed.” She then throws the curry they cooked down the drain, as she only wants Haruka’s cooking. Nao is desolate after that, and though she wants to see Haruka, she has to hide because Sora is always nearby. However, Haruka is always optimistic Sora will forgive and accept them both, as he, after knowing from Ryouhei that she changed, wants Nao to return to being a cheerful, caring, and lighthearted person. Sora lightens up a bit to the sight of Haruka and Nao being together, but still has some resistance, and prefers to distance herself from the two. It is for this reason that she never joined Haruka and Nao along with Ryouhei, Kazuha, Akira, and Motoka for the annual summer trip to the beach.

This episode replays the event where Sora asks Haru to take her measurements so she can have a uniform made. The next day Nao comes over to bring Haruka some mosquito repellent, since Sora is scared of mosquitoes, and then leaves almost immediately. The next day Ryouhei invites Haruka to the school rooftop to take a peek at the girls cleaning the pool. Haruka warns Ryouhei, though, not to peek at Nao, and leaves. Much later Ryouhei tells Nao that Haruka, “the prince she has been waiting for,” has a crush on her; but she thinks he does not like her. The truth is that something happened between the two many summers ago: Nao, trying to escape the noise of her arguing parents, ran to Haruka’s house. At that time Haruka was sleeping at their veranda, and was surprised to see Nao on top of him with her clothes undone. Until now Nao feels guilty for what she did. However, Ryouhei, even Akira and Kazuha, is into the act of bringing Haruka and Nao together. They did so by making the two meet at school pool on a Sunday. When they were changing after the swimming lesson, Haruka rushes into the girls’ locker room when Nao was scared by a black cat inside a box. The school supervisor hears their chatter, but the two were able to hide inside a box before he catches them. Thinking it was just the cat, he leaves. There, Nao gets to know that Haruka does not hate her, only that he was just surprised at the events of that summer day, dispelling her assumptions. Meanwhile, Sora shows her hatred of Nao, whom she thinks is the reason why Haruka has been preoccupied the past couple of days, at home on her laptop.

Haruka enters Akira’s room and stops her from burning something, which is her mother’s missing journal, where it is written that Kazuha and Akira has a chance of mistaken identity. With the journal, he suggests to Yahiro and Kazuha a DNA test to prove things once and for all. Yahiro refuses, but, despite disapproval from her mother, Kazuha agrees. Haruka informs Akira at the shrine the next day that the DNA results will be out in five days, but Akira disappears on the fifth day. Haruka finds her at the train station, where they talk until the evening. When the DNA results arrive that night, Kazuha and Sora delivers it to Akira, who is still at the station, but she buckled, too scared to read it. It is then that Kazuha’s mother appears, and tells everything at their home, where Akira is shown the lost pendant, returned to her by someone who found it at the mountains, basing on the name engraved on its back. She reveals that she and Akira’s mother had shared the same hospital room, and, one day Akira pulled the pendant off of her neck as Mrs. Migiwa held her in her arms. After hearing that Akira’s mother had died, she gave the pendant to her to make her feel, at least, the presence of a mother. Akira then reads the DNA results, and it read negative, which means Akira is born of a different mother. There, Kazuha’s mother let her keep the pendant, and apologizes to Akira. She later confesses her love for Haruka and vice-versa.

The Introduction to this episode replays the event where Haruka was standing near the girls locker room, overhearing Akira’s and Kazuha’s conversation, but this time, instead of walking away mislead, Akira comes out and takes the phone from Haruka. This allows for the story to have an alternative ending. Haruka notices that Akira has been acting strange lately, and decides to talk to her alone at school the next morning. He sees the sad look on Akira’s face and becomes worried, and wants to help Akira find her mother’s pendant (after remembering her losing it as a child). They go in search for the pendant by a tree they would play by as kids, only to Haruka’s horror that the tree had been removed by a landslide. He attempts at digging around for it, but without any luck. The two go to Akira’s residence to take a bath, and have a romantic moment together. From there, Haruka goes to the festival, and, after seeing Akira cry while dancing the sacred dance, rushes off to see what had happened.

On their way home from school, Haruka and Kazuha are interrupted by a frantic Yahiro, who is concerned over the non-appearance of the always-responsible Akira as usual. They discover Akira at her home, collapsed due to exhaustion, and Kazuha proceeds to blame herself and her infatuation with Haruka for not noticing Akira’s condition. Akira recovers a few days later, but confronts Kazuha about her abandonment of Haruka and the inappropriate sense of guilt she feels regarding their father’s actions. Realizing the truth of Akira’s words, Kazuha withdraws into a state of depression while struggling to determine what to do. The day of the festival arrives, and Kazuha works up the courage to appear, where she is reunited with Haruka. Haruka informs Kazuha that her father had been supporting Akira financially in secret all this time and, when Kazuha witnesses her father praising Akira, she realizes that she had misjudged him. Thus, she was able to move past her codependency towards Akira and pursue a whole-hearted romantic relationship with Haruka.

When Kazuha realizes that Haruka has overheard their conversation, she chases him down to clear up any misunderstanding. She reveals that Akira is, in fact, her illegitimate older sister, born of a different mother. Due to her family’s societal standing, Kazuha’s father is not able to acknowledge Akira as his daughter, causing Kazuha to be resentful of her father and to feel a burden of guilt and responsibility towards the always-hard-working Akira. To help lift Kazuha’s spirits, Haruka invites her out on a date, and they subsequently realize and admit their rapidly-progressing feelings towards each other. Meanwhile, Akira continues to try her best on her own, but collapses, apparently due to exhaustion.

Sora asks Haru to take her measurements so she can have a uniform made, and finally starts attending school with Haruka, though she is disappointed to find that she and Haruka are in different classes. While cleaning the swimming pool as part of a mixed gym, Akira accidentally soaks Kazuha who forgot her swimsuit, and so Akira takes her to dry off. Haruka finds Kazuha’s phone and goes to return it, only to overhear a sensual-sounding conversation in which Kazuha addresses Akira as “Onee-chan” (big sister).

After the sudden death of their parents, Haruka and his twin sister Sora move to the house formerly inhabited by their late grandfather, in a small village they often visited as children. There, Haruka encounters several of the residents, some of whom are old friends, but Sora stays at home, refusing to go to school even as Haruka starts attending. Realizing that Haruka is growing more and more distant and slipping from her grasp, Sora goes to Haruka’s room at night and appeals to Haruka as she removes her clothes…

“Visit!” “Hōmon!” (訪問!)

Set before episode 23, Nodoka arrives in the clubroom with a sample of the graduation yearbook. The yearbook needs to be checked by Sawako, who is sick with a cold. Curious about what her apartment looks like, the girls decide to pay her a visit. While looking through the album, they find a mysterious hand in the group photo, which turns out to be Ritsu’s. Despite Sawako’s objection, the girls decide to help her out around the apartment. They briefly visit Azusa, who is busy rehearsing for her freshman reception with Ui and Jun.

“Planning Discussion!” “Kikaku Kaigi!” (企画会議!)

Set just after episode 21, Azusa finds the light music club’s attempted recruitment video from before she joined the club, which was so embarrassing that Mio hid it in a cookie can. In order to recruit some new members for the next year, the girls try to come up with pitches for a new recruitment video, but to no avail. After talking with Ui and Jun, Azusa comes up with the idea of filming a documentary of their activities, intersected with interviews from fellow students and staff. The video turns out great, besides one scene at the end which Azusa is not too keen on.

“Graduation Ceremony!” “Sotsugyōshiki!” (卒業式!)

On the day of the graduation ceremony, Yui gets off to a rough start by being late and ripping her tights. Meanwhile, Azusa is similarly distracted and ends up banging her head. The girls hold on to a card signed by the entire class, though Yui’s attempts to hide it during the graduation ceremony cause Sawako to grow suspicious. They later give Sawako the present as thanks for being their teacher. After the classroom empties, leaving behind several goodbye messages on a chalkboard for Sawako, the girls go to the light music club room, shortly followed by Azusa. However, Azusa, who had been holding in her feelings all day, finally breaks down into tears, begging them not to graduate. To cheer her up, the girls perform a special song that they wrote just for her.

“After School!” “Hōkago!” (放課後!)

Although they are not supposed to be at school until graduation the next day, Yui and the others decide to hang around the club room, though they have trouble figuring out how to pass the time. They clear out their desks and visit the student council room before getting Azusa to buy them some lunch. Wanting to leave something behind after they graduate, the girls decide to record an album of their songs.

“Entrance Exams!” “Juken!” (受験!)

As the seniors prepare for their entrance exams, Azusa decides to make them a chocolate cake for Valentine’s Day, getting Ui and Jun to help. When the day comes, Azusa becomes nervous about presenting the cake to them and is also worried about their impending graduation. However, her friends encourage her and the cake is well received, even getting a speedy White Day gift from Yui. The next day, Azusa makes an expensive prayer at the shrine for the girls’ success, and later receives word that they have all passed their entrance exams.

“Graduation Yearbook!” “Sotsugyō Arubamu!” (卒業アルバム!)

With photos for the graduation yearbook coming up, Yui uses Ui as a model to determine the best hairstyle, though feels weird when she leaves her hairpin on her. Although the seniors have finished their clubs, the girls decide to use the light music club room to study for their entrance exams, though Yui and Ritsu have yet to decide on their university choices. While trying to trim her bangs for her yearbook photo, Yui sneezes and accidentally cuts them off, giving her a completely different look. After their pictures are taken, the girls learn Mio had turned down a recommendation for a university because she wanted to study together with everyone. Upon hearing this, Yui, Ritsu and Mio turn in their university preference applications to Sawako, opting to go to the same women’s university as Tsumugi.

“Yet Another School Festival!” “Mata Mata Gakuensai!” (またまた学園祭!)

The girls get on stage for their performance and are surprised to find everyone in the audience wearing the same shirts as they are, which moves Yui a lot. During their performance, they sing two new songs, and Yui gives her thanks to the people who have helped her, and even gets thanks in return from the others. After their performance, the girls look back on their previous years and start to become upset knowing that this is their last year together, but manage to cheer each other up.

“Romeo and Juliet!” “Romi Juri!” (ロミジュリ!)

As the seniors prepare for the play, Azusa worries that there has not been enough practice for the live concert. As the play goes on, the backstage crew realize they are missing Juliet’s gravestone needed for the climax, but manage to borrow something from the occult club in time. After a successful play, the girls apologize to Azusa for making her worry and decide to hold an overnight practice session at school. Later that night, they browse through the closed stalls, where they find the missing gravestone, and give their thanks to the occult club. The next morning, Sawako gives the girls special After School Tea Time T-shirts for their upcoming performance.

“Leading Role!” “Shuyaku!” (主役!)

Much to their dismay, Mio and Ritsu are respectively nominated for the roles of Romeo and Juliet in the class play. Mio has her usual problems with the pressure of being center stage, while Ritsu cannot act ladylike enough for her role. After not being impressed with having other girls train for them, Ritsu and Mio decide to have a cram session. While doing impersonations of each other if they switched roles, they find the key to successfully acting out their parts. Noticing Mio still lacks confidence, Tsumugi arranges for her and the others to work as maids in a high-end cafe to help get over her embarrassment. Although she gains some confidence, Mio insists it is different from being on stage. Meanwhile, Azusa grows concerned that, with everyone rehearsing for the play, no one is preparing for the live concert.