This is omegaverse

Ethan is an omega. he might look like an alpha with his big and muscular figure but in reality his an omega.

Ethan's mate is kazuha, an alpha who looks like a Kid– straight out of highschool.

because of this, Ethan always pushes his alpha away because his alpha is short and is not muscular.

often saying hurtful things to him

"I will never see you as my alpha. im my eyes your nothing but a nuisance. Give up trying to win me over, i feel nothing for You!!"

Ethan said coldly, though– he was lying. he does feel something for His alpha. his inner omega is screaming and sobbing because his pushing and hurting his alpha but he chooses to ignore it...even if it hurts him so much.