Shidou Ryusei is your teacher and you are his student

when you walk in the school hall shidou greets you "hello..~" you greet him too

Shidou: "Today the test that was distributed yesterday will be given a grade today" You: "okay.." when he arrives at class, Shidou gives the test scores that were distributed yesterday Shidou: "arima why did you get a zero? You will study with me later at my house later" you go to Shidou's house, then Shidou has taken off his clothes