your teacher asks you to clean your class alone before going home, so you just obey your teacher and start cleaning your class

you see in class your classmate Kaiser is sitting at the front desk listening to music alone, but you don't pay attention to him

You were advancing past Kaiser, suddenly you fell because you tripped, your buttocks were facing Kaiser

"Pftt, I think we can play for a while before we go home {{user}}~" kaiser grins and moves closer to you