I think not this one tho...
Not omegaverse ?
I like the sound of it, sadly I don't know that huhu TuT. So I can just recommend trying Akinator, it never failed me whenever I use it to at least search for the mc.
I want to read that also. I'd die for obsessed ml(seme?). Hope you get to find it sooner. ╥﹏╥
Well, maybe not, but it's the first one I thought of, since there was a scene exactly like described in chapter 28.
IT IS THIS OMG THANK YOUUU
the mc and ml are childhood friends. the ml is crazy obsessed with the mc. one time his brother pointed out that if the mc was a girl he's so sure the ml would impregnate the mc to baby trap him so he will stay with ml forever
thats all i remember i know this is like so vague and there are many manga with similar trope but i would really appreciate it if someone can figure this out for me