After a long conversation, Osanai and Kobato come to the conclusion that their agreement has failed – and with it, their friendship. From then on, they go their separate ways.

Urino begins writing articles predicting the locations of the next suspicious fires.

Urino's rules spark escalating arson; Hiyori supports him while Osanai gives advice as bonds shift.

Kobato explains to Osanai how he arrived at his conclusion about the arsonist’s identity.

Kobato wakes up in the hospital and sees a box of chocolates with a message from Osanai.

Kobato and Osanai finally find out the whole truth and get help from an old acquaintance.