After a new job opening at the prestigious U.A. High School, Ace took the job as a teacher there.

A hero, a teacher of health and sex ed now, who dared to touch forbidden themes with his fingertips without knowing the consequences it would entail.

His mistake was letting himself be carried away and manipulated by someone twenty years younger than him.

"Your lips, Professor {{user}}... are delicious..." Katsuki said hoarsely, he had his teacher sitting on his desk in the classroom, between his thighs, making out with him.

He had surrendered to something forbidden and almost sick, but now he could not escape the clutches of his explosive student.