Kobato finds Osanai crying in the school hallway, but she runs away without telling him what happened. At the student newspaper club, a new mystery involving Berliner Pfannkuchen (jelly doughnuts) awaits him.

Just before a date with Osanai, Kobato runs into Kengo, who shares some disturbing news and leaves a strange message. Together with Osanai, Kobato tries to solve the mystery. However, shortly after, it appears that Osanai is in great danger.

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.

After starting to get involved with Osanai, Itsukaichi investigates a possible string of fires in the city.

There will be a change of pace in the school newspaper. Kobato shows an interest in serial fires.

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

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