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

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

In the hospital, Kobato thinks back to the circumstances around Hisaka's car injury in middle school.

Kobato finally manages to see Osanai in the hospital, revealing a sinister and terrifying truth.

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