ひたぎクラブ 其の壹
Hitagi Crab Sono Ichi
Hitagi Crab – Part 1

Koyomi Araragi catches Hitagi Senjougahara as she falls down from a great height, Koyomi immediately notices that Hitagi weighs little to nothing, however he does not mention this to her. Later he asks Tsubasa Hanekawa, the class chairman, about her.