I think?
http://www.mangago.zone/read-manga/ai_subeki_sadist/
and... wow.
KSHQJAJAJ THAT IS A DETAILED EXPLANATION HSHHSH
I am also looking for this yaoi manga... From what I recall there were 3 chapters. The seme and uke meet through friends (I think) at a bar, it's bdsm, the seme is kind and wants the consent of the uke, the seme wears glasses and has short hair, and at some point the uke complains about their dick hurting because of the torture the night before, and they have a spacial room for it
looking for this yaoi manga, the seme is a masochist and he met the uke in a bdsm bar. the story is like the uke likes his step brother and there was a miscommunication between them and seme help clear them up.....
to be honest a threesome ending would have been awesome but it didn't end that way lol.
the ending i wish would be like the three of them doing like vouyerism, seme watching the 2step siblings doing it getting horny watching his lover being violeted by another guy aside from him, self conflicted between jelousy and lust, he just wanna see his dom saisfied and happy. the step brother seeing this, he step up his game, he lift the uke and fuck him infront of the seme. the dom uke, overstimulated and embarass, he cum on seme's face. not long after that the step brother also cum after several thrust. he then spread the uke's ass and let the seme see the uke's hole leaking out step brother's semen. the seme could not hold himself back from wanting to eat out his hole, and so he did, he moved without even thinking, he let his body took over his mind. fuck fuck fuck! please let me put it in, the 2 step siblings smirk as they see the pathetic looking seme on the ground with his cock hard as rock pointing straight to his abs spilling precum all over the floor. the seme then beg to let hm put it in, but the uke said NO! i did not give you permission to lick my asshole, it seems that you need more discipline! FUCK! the seme soon regreted his action, Im sorry master, please punish me! hahaha since you ask ypurself to be punish, then fine, originally i plan to just discipline you with a whip, but since your so eager, your not allow to cum for the whole night. the seme once again regreted, fuck i just never learn.. before he even speak, the older bro put on a mouthgag, now he is bound and gag not able to do anything but watch till morning while the two step siblings indulge themselves with pleasure ofcourse, not forgetting to put up a show infront of him. and all the seme can do is whine and growl on his mouthgag despretly stopping himself on rubbing his hard cok on the floor as to not extend his punishment
sorry, please ignore my imagination