Does anyone know the name?

Okay it’s a yaoi manga and it’s omegaverse based I’m pretty sure. There’s this rich guy who goes to get his marriage partner and ends up choosing the male omega, whose heat has never started. Instead of choosing his twin who’s like both a girl and a boy? And the rich guy ends up giving the male omega a pill so a “fake heat” would start.
Sorry for the sucky summary it’s been a while since I read it