pls help

so i’m trying to find this BL it’s an omegaverse one. The Mc is an omega who helped the ML with his heat i think it was his first heat. The next morning when the ML woke the MC left. Years later the ML moves into a new apartment and SURPRISE the MC is his neighbor and he has a kid. And the kids father his the ML. Also the MC has black hair and purple eyes (i think) and the ML has brown hair and green eyes (i think)