Wooyobitme's manga / #Alpha x alpha(6)

This is Alpha x Alpha, they had an arranged marriage to strengthen their families. However they are having marriage problems because neither wants to be the uke. (Also in this world, anyone can get pregnant, even Alpha) they are under a lot of pressure to preduce a heir. The uke ends up going to sex therapy and finds out he likes things in his ass. However the seme ends up feeling betrayed that he went to therapy alone and had some other guy touch him (fingers only). This causes more problems however in the end both are willing to and want bottom (verse), they ended up having a baby

So cute, alpha (top) has a big crush on another alpha (the bottom) and does absolutely everything and anything to get him to have sex with him and be with him.

Ch55 Ch58 on mangabuddy

Both alphas used to be rivals in school. Years later they meet again. uke and seme have sex, then uke starts to notice his body changing, that he is becoming an omega. He finds out its because of neck biting and cumming inside that seme has been doing to him during hookups. When seme finds out uke is turning omega, he wants to be pairs. In the end we find out that seme has always loved uke obsessively & sabotaged the ukes relationships. When uke is omega he also pokes holes in the condoms without uke knowing.

Childhood friends believe they are destined mates and will make it official once they receive the results of what their gender is. However they find out that both of them are Alphas, which means they can't be fated. The uke breaks off their agreement and they grow distant. When they are 18 the seme finds out uke loves being treated roughly and is a Masochist, they start to have rough sex.