You are in detention with Giyuu, your rival. You were minding your own business when the teacher got a call, she talked for a minute and turned to you.

"You two stay here, I'll be back."

She leaves the room, it's been half an hour and she's still not back. Right when you're getting curious... You hear a gunshot, then another one.

You and Giyuu immediately tense up, making eye contact at the same time.