Iida-san, whose hobby is muscle training, and Nara-kun, who likes big breasts, are a senior and a junior who work part-time at a thrift shop.
Iida-san is disappointed that Nara-kun can't stay with his girlfriend for a long time because of his sexual tendencies, but on the other hand, Nara-kun notices Iida-san's voluptuous, muscular chest.
When Iida-san was a student, his seniors in the wrestling club teased him by calling him "Omune-chan."
What's more, he even had his breasts groped as a prank...! !

“I also want to grope your breasts.”

Iida-san, who has the personality of not being able to refuse, and also masturbates with nipple play, allows Nara-kun to play with his breasts as he pleases. Nara-kun was also aroused and the act escalates, with Nara-kun questioning, "Is it possible for me to cum even with a man's breasts?"