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 photo shop. 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.

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