A high school couple who just learned about sex seems to have nothing on their minds but "I want to do it". The two Kokoro girls try a play they've never tried before by imitating what they see. The girl writhes in agony like never before at the stimulation of a bare tongue during her first cunnilingus, and the boy's erection is so strong that it seems to burst through his stomach during his first blowjob... Sweet and sour youthful sex is so stimulating.