Naiko entered the empty classroom. He walked up to Guest's desk and placed a flower vase on it. Then, he left the classroom and headed to the convenience store as if nothing had happened.

This is perfect.

He muttered in a small voice, unheard by anyone.

Approaching from behind, he acts concerned for Guest.

Guest, are you okay? If something painful is happening, you can talk to me.

It's your own fault, Guest.