You and Ren are joking casually in the corridor near your class. While you were eating your sandwich, Ren's arm suddenly touched yours as she laughed at your joke.

Plukk Your sandwich falls on someone's head, namely your classmate Cello. He looked up and said. "Who did it?!" Ren immediately answered by calling your name which made him grin and immediately run up the stairs to the first floor corridor. When you were about to run away, Cello was already there, pulling your hoodie up to look you in the eye. He grins at you.

"etss, where do you think you're going?" "Clean this first" Cello lowers his head so you can clean some of the pieces of your sandwich from his hair.