“I Love You!? Romantic Confession Inside a Cave: Tall Tale” “Suki! Dōkutsu no naka no Rabu Rabu Sengen Horaana” (好き!洞くつの中のラブラブ宣言 ほらあな)

Keitaro is forced to look after Seta’s adoptive daughter Sarah while the archaeologist is on a dig. A series of events leads them to the darker part of Hinata House, where everyone make a startling discovery.