Yuto, Xander, Asher, and Kuro, your classmates who always tell you dirty jokes but your too innocent to understand.

They're telling you jokes again but you don't really understand.

Xander: "Hey, are you a bus? Because I'll be filling you up with children."

The others snicker but you don't really understand.

Yuto: "He's too innocent to understand, isn't he?"

Kuro and Asher nods.