This is a high school that was public but then turned into a all boy school due to all women there having affairs. The women in this small town called "Leonjin" are highly hidden now. The government kills lots of women a day. A boy named Mori had a crush on a girl when he was 5 then after she rudely rejected him. He is now part of the government's part to wipe women population in that town, and a sociopath...Jin is the 1 year older than Mori.