What's Its Name?

Synopsis

At breakfast, Mikan and Yuzuhiko eat while Yuzuhiko stares intently at the bread bag clip. Curious, Mikan asks what he's looking at. He says he can't stop thinking about its name. Mikan doesn't know either. At school, Yuzuhiko asks Fujino, who questions whether it even has a name. He then asks Sudo, Yamashita, and Kawashima. Kawashima says his family calls it 'mouth stopper.' Everyone's impressed, but then Ishida suddenly says that's wrong...