Ok ok. So this description is going to be really vague and I'm so sorry for that. All I remember is this one scene where the two guys are in the seme's room and they only have a few minutes before they get called down for dinner. So the seme tells the uke that if he can last and not cum before the sister knocks on the door they won't have anything to do with eachother...I think the seme wins the bet and then he tells his sister that the uke is "sick" and they have sex on the bed?
Now, I usually don't say anything when these come up on here but really? Who the heck is putting these up on this site? Please please please go read this on line webtoon. It's completely free and it will support the author
I read on both. Webtoon doesn't allow me to take screenshots anymore so...