Kohgawa has a past where he was raped by a classmate. He admired his homeroom teacher who helped him stand back up from rock bottom and aspires to become a teacher himself. He succeeded in reforming the troubled class at his assignment and even got married privately, ready to welcome the peak of life's joys. Just then, a letter from a student contained old rape photos… His students passed them around one after another, driving him to the brink of mental collapse…
