Living in an old Tokyo district, Kenichi works at a second-hand bookshop to support his sister, Yoko, a high school student. When Yoko graduates, she starts work at a photoshop. By the time, Kenichi's girlfriend has decided to marry someone else as she is tired of waiting for him. When Yoko starts dating Kenichi's best friend, Makoto, he is strangely resentful, but when Makoto is involved in a fatal accident, brother and sister resume their routine life.