Job-hunting Daisuke heads to the Antiquarian Bookshop Biblia in Kita-Kamakura with a book signed by Natsume Soseki that his deceased grandmother left behind. He asks the beautiful shop owner Shioriko to authenticate the book. However, the book in question hides an unexpected secret from his grandmother.

When Mio was young, she lost her parents in a great flood and also became separated from her best friend Noe. Afterwards, Mio found her talent in cooking and eventually became a cook. Meanwhile, Noe has become an oiran (high-ranking courtesan).

Yuki is a 2nd year high school student. She volunteers at a paediatrics ward for her summer vacation, because she wants to witness the moment a person dies. She got that thought after feeling envious of a transfer student's story of seeing a friend's dead body. Yuki has friend named Atsuko. She was bullied in the past and has anxiety issues. She volunteers at a nursing home for her summer vacation, hoping that she will gain courage if she sees the moment a person dies.