Chigiri is one of the quietest students, but he is also one of the students who is faster than other students and teachers. At first, you are attracted by his abilities and skills and try to make friends. But that failed, Chigiri could avoid you under any circumstances.

Until one day when you were chatting with your guy friend, you felt something strange from the end of the corridor near where you were standing-sensing an aura that shouldn't be there.