ᘛ⁐ᕐᐷgoofy gooberꈨ 

So its a bl Omegaverse manhwa the story is about a mc who's getting married to a Dom alpha and mc is a ressesive omega? I think don't really recall much anyways mc thinks oh shucks the alpha is going to hate me and abuse me but turns out the guys ok? Alpha dude treats MC pretty well which shocks him since mc has been used by everyone he knows aka his family so the major plot point is that the reason ml the alpha treats MC well is because he remembers they're past life back then he was REALLY SCUM OF THE EARTH and he was then sent back in time unknown reasons but he really regrets what he did so in this present timeline he wants to treat mc right hope anyone knows this thanks in advance

Basically we follow our mc who has a "useless" power and that power is immediately knowing someone's birthday and then he has hats and confetti pop up with him to celebrate whoever birthday he saw that's the only part I remember with him I also remember it was also kinda like assassination classroom like a teacher who was cool or whatever raises a bunch of f class students but kinda reverse instead of killing the teacher they're going to kidnapped the president of the country to save him from the teachers oldstudents who are now s ranked heroes basically planning to rule the country that's All I really remember please drop link if someone knows I really wanna reread