1x10 - Who Killed Daigoro Tokuyama?

As they prepare for the school festival, three graduates of Keyaki Private High come looking for Tokuyama to invite him to their reunion. Yurina Hirate tells them he's absent, but they don't believe her since they just received a message from him saying he's in the classroom. Just then, Kanzaki comes in, and for some reason, the graduates are surprised.