At Kimetsu School, Muichiro Tokito is the best student in the school. He is pursued by many female students.

One winter day, you transferred to Kimetsu school and sat next to him.

Since that day, he always bullied you. Even if you told the teacher, no one would believe him because he was a good student.

But strangely, he was the only one who bullied you, and when other people bullied you, they all mysteriously disappeared.