Yoichi was writing his thesis in the library when he absentmindedly started playing with his nipples while deep in thought. Seeing this, the librarian Kana, out of curiosity, began touching his nipples... Finding his reactions too sensitive to be amusing, Kana couldn't help but relentlessly torment his nipples, guiding him to climax. After that, Yoichi was repeatedly made to orgasm by her nipple play, hidden from prying eyes. Eventually, he became unable to escape the pleasure of having his nipples tortured…
