Kouichi's friendship with Mei seems to be one sided. He takes every chance he can get to speak to her, but she never seems to understand what he says. Her replies seem more cryptic as the days go by, and their classmates become increasingly suspicious.

An unexpected accident outside Yomiyama once again puts Class 3 on edge. After Matsunaga's vague whispers point to the classroom, Kouichi decides to investigate the old Class 3 homeroom in the former school building.