The love story between a high school boy and his school girlfriend would be beautiful if it weren't for the arrival of the intern teacher Ishihara. Being the most troubled and low-performing student in the class, he is often kept behind after school for extra tutoring by the lascivious teacher Ishihara. Gradually, the relationship between the two grew distant in terms of status, but very close emotionally, to the point where his girlfriend became jealous, envious, and had to cheat on him with another guy. Upon learning this, he felt extremely angry and sad, and during those times, she would come to support and console him, and eventually, love blossomed between them. Over time, their love deepened and intensified to the point where they engaged in secret affairs right in the classroom and library without any hint of embarrassment.
