When Kobato goes to visit Osanai at her home to invite her to eat candied apples, he learns that she has been kidnapped. Just as he leaves the apartment, he receives a mysterious message from Osanai and, with Kengo's help, sets out to find her.

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.