I recently returned to my parents' house after a bad job, and I was helping my grandfather at a second-hand bookstore. The countryside was uninspiring and I was just wasting my time, but I recently found something to look forward to. - That is to play a naughty prank on Mugi-kun, who often comes to such a lonely used bookstore. - A mysterious relationship with Mugi-kun who got an erection and ejaculated when she stimulated a little before one person. - Actually, Mugi-kun's sexual treatment is an excuse and I just want to feel good.