Bakemonogatari

Koyomi Araragi is a third-year high school student who is almost human again after briefly becoming a vampire. His unusual past shapes his encounter with Hitagi Senjōgahara, a classmate notorious for never speaking to anyone. One day, Hitagi falls down the stairs and lands in Koyomi’s arms. Their meeting brings the two students together, though the supplied synopsis leaves the circumstances and what follows unstated.