Gakusei Kaichou Shidou Kina no Inutsu -Gakusei Kaichou Ken Koibito no Netorare Gijiroku | 学生会長・紫藤喜那（しどうきな）の淫鬱

The student council president, Kina Shido, had a lover. It was Taishi Mitoya, who was seen as a delinquent student at the academy.

Although Taishi has a rough and delinquent image within the school, Kina boasts about him as a kind and wonderful boyfriend. Because she knows Taishi better than anyone else. Because she is his lover and childhood friend.

The two of them had their own happy daily life and loved each other. But there was someone who wouldn't forgive Taishi...

The big trigger was when the principal, Goro Ayukawa, panicked after learning that the ○ people involved in the bullying incident that Taishi wanted to help were his own sons. He absolutely couldn't let it be revealed that his son was the main ○ of the bullying.

Ayukawa used his authority to push all the responsibility onto Taishi and tried to expel him. Kina was the only one who put a stop to that decision. Ayukawa, who wouldn't correct his own wrongdoings but wouldn't tolerate student misconduct, set his sights on Kina.

"You've caused me trouble. I'll harass you to make you understand," he thought.

Thus begins the principal's nightmarish revenge NTR that will drive the student couple mad.