got spoilers? :D
Oh, I don't know since it's not really a long story so I'm afraid i'll give too much away and it'll ruin the fun :0
let's just say yuujin and rei were very aware of eachother since the beginning and actually the drama revolves around rei and his feelings for yuujin, shion and his own "omeganess", which lead me to this r*pe topic, i know some people are put off by the s*x and call it r*pe. I wouldn't call it like that tho, it's more of dubcon to me because, although Rei wasn't a fan of the idea and he would've thought about it twice if it wasn't for his heat, he actually agreed to have s*x with yuujin because he knew it was convenient and it'd protect him from other alphas. Rei was raised as an alpha and he really wanted to be an alpha to fulfill his familiy's expectations so, the fact that he was enjoying s*x as an omega with yuujin threw him off and he panicked and that's why he was angry (also, you know, because of his conflicted emotions for Shion). The one who is a son of bitch is sena's uncle though, everyone will hate him. This story has like 8 chapters total (the normal 6 and two more) and there's also a spin-off of another two characters of this universe. Personally, i hope there's more~
wheredid you read it
it's in spanish though but here: lectortmo.com/library/manga/41872/anti-alpha-omegaverse :)
This is one of my favorites! I didn't know it was getting an english translation. It has a rookie start but their relationship develop quite good, I'd even say adorable. Yuujin can be such a brute but his feelings for Rei are honest, so expect some good drama~ 10/10 would recommend