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.

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

Kobato remembers his encounter with Osanai when they were in middle school.