Coleng06's Things

I read a yaoi manga a while back and I wanna go back to it but I forgot the title.

The story was set in omegaverse, 1 alpha and 1 omega student. Student thought he was an alpha all this time but was actually an omega. He was raped by some alphas, including alpha MC, who was his friend. Story timelapsed into them being adults already with different partners and alpha MC realizing that omega MC in high school was actually his fated mate.

Please if anyone knows the title please tell me. I'm desperate.