A hardcore bookworm tries to stop a robber at a restaurant and his life is changed forever.

Kazuhito and Natsuno wind up at Kazihito's place, where they run into a familiar figure.

Natsuno faces a slump in her writing; a slasher claims more victims and Natsuno investigates.

Kazuhito and Natsuno get closer to finding the slasher; Kazuhito's sister has plans for her dog-brother.

Kazuhito's sister and Natsuno face off; the slasher's identity is revealed.

Kazuhito's favourite bookstore is going out of business and he investigates.