A male high school student's secret that his friend's sister knows he has sensitive nipples is exposed. This ignites the sister's 'S heart'! The male high school student, whose nipples are slowly tormented, gets an erection! Unable to hold back, the sister pushes him down and inserts herself... Enjoying his sensitive reactions, she teases his nipples while riding him in a spider-style position with shallow thrusts! Tormented to the point of no return, he ends up ejaculating inside her!!
