Anyone know mangas like this?

Like an alpha being dominated by an omega or just a big guy being the uke and the small guy a seme?

An alpha being dominated by a omega ;>;
(But like, not the ones where it's the pointless sex tho ;>;) ╥﹏╥

http://www.mangago.me/read-manga/sutenaide_my_hero/

its not very romantic but its the only one i can remember having a seme omega and a uke alpha. I dont remember the story much tho

There's one called boku no high spec kareshi-sama

Oops I totally forgot about this topic but here’s one. http://www.mangago.me/read-manga/like_a_tidal_wave_from_pheromone_shower/