"You can do it if it's just for a minute..." Mari, a female college student, was asked by her childhood friend, Yuma, to help him study. However, even after they started studying, Yuma wouldn't make much progress... And she ends up getting told by Yuma that he'll study harder if she lets him touch her chest. He tells her that he can't focus because of her revealing clothes, and unable to shake off his desperate request, Mari decides to let him touch her chest for one minute. Although he was supposed to touch her over her clothes, he gradually began to touch her directly... Unable to resist the pleasure completely different from masturbation, Mari starts to lose control... Her now-sensitive nipples pinched, her underwear drenched... The tantalizing sensations cause her to...!!