Misawa Takuya♂

Belonging to the astronomy club, which is on the verge of disbanding due to a lack of members, he gathers information on schoolgirls and teachers on campus and sells it to anyone interested, "the informant behind the scenes". He sources any information and gets paid for it. He will do whatever it takes to achieve his goal, and will not tolerate anyone who stands in his way.
His parents divorced when he was young, and the main character followed his mother around. The mother soon remarries, and the protagonist goes to live as the second son of the Sanada family, but the relationship between the mother and Sanada soon sours, and the mother disappears before you know it, leaving the protagonist behind. His father-in-law and brother-in-law have treated him harshly, and he and Eiji are at odds at every turn, and their relationship has become so sordid that they consider each other natural enemies.
One day, the protagonist stumbles upon a secret meeting between his homeroom teacher Miyuki and Eiji, and plots to use it as an excuse to get rid of Eiji. However, when Rihoko, who happened to be passing by, intercepted his plan, he began to humiliate the female teachers with her help.