I would also like to know which manga this is. I can only think of one manga where the uke puts up with bad sex, but I don't think it's the one you're asking for, because of the rest of your description. But in case it is, here's the link:
http://www.mangago.zone/read-manga/ore_wa_senpai_no_nan_nan_desu_ka/
Thank you! But that's not it • ‿ ,•. I really can't remember the title or summary, but i'm sure it's a manga that i read not long time ago here ಥ╭╮ಥ
Update : GUYS IT BEEN SO LONG but i finally found it. It's a side story (?) Like another story of Doronuma, here's the link. It's on chapter before season 2 (i'm so glad i found it.)
http://www.mangago.zone/read-manga/doronuma/
It's on chapter 5 ( ˘ ³˘)
Ah, thanks for sharing the link! Will check it out sometime. Glad you found it :) (It's always a relief to find something one's been looking for for ages!)
I'm searching for a certain manga. Uke fall in love first and did confess but they didn't going out. Even so, their meeting up to having sex and even though the seme was too rough, uke always bear with it and pretend that sex with him is good.. turns out seme thinks that they already going out. Do you have any clue? I want to reread it so badly.