Please help if you can!!

I'm looking for this (yaoi) omegaverse and I can't remember what it's called: there was an omega who gor raped in school and ended up with one of the rapists baby. Some years later the little girl (rapists baby) has grown a lot and is now helping her mother (the omega) to make his life easier. I think the omega works as a janitor or something but I can't remember. Anyway the omega works as a (janitor) at a school and a Alpha randomly runs up to him and starts saying "you're my soulmate" and stuff. The omega get a little scared and annoyed, because he now hates alphas (after getting raped ofc). Blah blah blah long story line and then they finally becomes mates and have a child. But out of the blue the omega meats the father of the first child ( he's the rapist). He just starts to behave creepily (like starts to touch the first child's hair, saying "do you look like your mom or dad" and stuff) the omega then turns on protection mode and snaps at the alpha. Some time later the girl says "I don't wanna live with a liar I'm going to live with my dad" she sobs, puts on her boots and takes her lil brother with her (I guess the omega has told the girl that she doesn't have a father or something, and now she found out she do) the omega later has a long talk with the lil girl and the girl forgives her mom and stays. Then there's just a story line with a bunch of sex and the omega yells at the the lil girls father (the rapist) and slaps him (I think the rapist ends up loosing his job because he threatened the omega and said he was gonna rape him again) then I think it ended. Please tell me if you know this manga!!
(=・ω・=)