Lost yaoi

I want to find a yaoi I've read before. it was omegaverse, omega x alpha. Omega is a high school student, he meets per chance his fated pair his alpha. But this alpha is.. in grade school or something. He's very young.
So omega tries to meet with him while pretending to be normal without having any kind of weird relationship, but he has to take a lot of suppressants... and it doesn't really work cause he's in heat a lot of time after meeting him and even when he's with him sometimes.
The mom of alpha discovers omega, and to protect her son she sends him to his grandmother so that he can't meet omega, who's always in a sexual state when in contact with her son so it's innapropriate. Both omega and alpha are very sad but they know it's for the best (especially omega who's older), and they have to wait until alpha is hmm, maybe 16 or something. Then they meet again and finally go out and have sex.
Omega was blond and white skinned, alpha had black hair and also white skinned.
Does someone know this yaoi?