Female teacher Jun. He is sober and serious, but has an affair with a colleague's gym teacher because of his weak personality. "It's a pure ass, it's super sexy... Wear this transparent pants and teach me." Creampie SEX until the affair is discovered and the student who grasps the weakness is lured to sleep. "Since you're having an affair, you can have rough sex with us, right?" At first, Jun resists, but... he completely falls into the hands of a disloyal underage Namachinpo! ! Deca Ass Trembling Vulgar Iki! !