PLEASE TELL MEH

There's this yaoi omegaverse manga, i've read here before but forgot the title. But i still remember quite of the story. It actually goes like this, where the uke goes to the traditional house of his lover(?) and then there is also the siblings(?) of the brother and they fucked the uke so bad showing it also on other people outside a veranda. The uke, was like has some genes of attracting guys through the smell(?) Also there is something in his butthole like flower shape thingy.