Can't find this manwha

Okay, so it's essentially a smut manwha, it's wlm. The protagonist is a guy who is like the leader/manager of this kpop group. Idk just some female singing group. The protagonist downloads this app that digitally inserts the kpop group (not really but like, copies the female members of the group into this game setting.) and basically, he found out if he has sex with them, that they will 'level up' in the game, which also affects them irl. Like each time he has sex with someone, they will sing better, dance better, or just, yk? Im sorry if i explained this poorly but I'm sleep deprived and I'm at my wits end. I originally read it on hentai20 but i cant find it now, and I came here bc theres a lot more variety. Plus, i hoped to find a new series to get my mind off of that stupid manwha