She Recommends The Harem.

Following an intense session of physical intimacy, Dojun is blindsided by a statement from his girlfriend that defies all logic and expectation. Instead of the usual post-coital whispers, she drops a bombshell that leaves him reeling in shock: “Babe, have you ever thought about getting a fuck-buddy?” Far from being a test or a trick, it turns out to be the opening act of an extraordinary "Harem Project" specifically designed to handle her boyfriend’s inexhaustible stamina and high libido. The ambitious goal is set: seven different women to fill every single day of the week, ensuring he is never left wanting. As the boundaries of their relationship dissolve into a provocative new reality, his girlfriend even takes the lead in scouting the candidates. With a mischievous glint in her eye, she suggests the perfect starting point for their scandalous venture: "First... how about the girl next door who always masturbates while eavesdropping on us?" (Source: Lezhin US)

My name is Daiki Komada. I’ve got incredible stamina and a decent-sized… well, you know, but my looks are nothing to write home about. At first glance, I’m just an ordinary guy, but I have a girlfriend who’s so beautiful everyone envies me. It all started after a particularly passionate session with her. “Want to find a fuck buddy?” she asked, making a shocking proposal! Apparently, my sex is so good that the aftermath is a real hassle for her… That conversation was the catalyst for a stream of beautiful, unique women to start coming to me seeking sex… A college student and childhood friend with a model’s figure, a busty working woman with a boyfriend, a former idol turned video streamer, and more—. Way beyond what I ever imagined, a huge crowd of beauties has gathered, and it’s practically a harem now!? An insanely erotic comedy featuring these beauties and a muscle-bound guy begins here!