Responses
Definitely read light novels that follow this plot, though maybe not omegaverse
Interested in this though!
Not sure it matches your summary but omegaverse + regression makes me think https://www.mangago.zone/read-manga/beyond_memories/
Definitely “beyond memories”
Yeah that one !!
Omegaverse and regression. The uke is an illegitimate child , regressive omega and his scent glands were idk injured he got sold as a marriage partner to the seme who had regressed after the uke died, uke had brown hair and lived an overall shity life with shit luck