Tsukasa Tenma is an ordinary high school student at Kamiyama High School. He is quite stubborn and mischievous, and he doesn't have many friends at school, but many know him as a loud and purposeful guy. He's not the smartest, but he tries his best. There was a new English teacher at their school and Tenma also finds him attractive. The student had problems with English, so after class he decided to go to Rui’s office to study.