Yoichi was writing his graduation thesis in the library, but while he was thinking, he couldn't help but play with his nipples. Kana, the librarian, saw this and touched his nipples out of curiosity... Kana was amused by his overly sensitive reaction and couldn't resist, so she relentlessly teased his nipples, bringing him to orgasm. Yoichi continued to cum as she played with his nipples over and over again, out of sight of others. Before he knew it, he couldn't escape the pleasure of nipple teasing...