Tensai Mahoutsukai to Hametsu no Inmon (RJ01433496)

A magical academy where students of magic gather.
At this academy were Liliene, a genius magician from a prestigious family, and Balas, a third-rate magic teacher disliked by the female students.

Liliene sought to expel Balas from the academy for his sexual harassment toward the female students.
In response, Balas challenged her to a wager, staking his own expulsion from the academy.

The terms of the contest were that Liliene would lose if she came to love Balas—in other words, if she fell for him.
Confident that such a thing could never happen, Liliene accepted with ease.
However, she did not realize that during the contest she had been branded with a crest bearing aphrodisiac effects—an “Inmon” (Lewd Mark)—and the match proceeded…