Whoa I think you have a whole story there. Well there is Turning if you are interested it’s an omegaverse and also a regression story. The uke, Yuder have a similar personality as Jaechan just a lot more cold. But clearly the relationship between the uke and the seme there isn’t exactly like you described but kinda in a way. But I can assure you the story is really good though.
What's the title(Ф3Ф)
It’s ’Turning’ there is two seasons for now (≧∀≦)
Tyy m(_ _)m
Try senza replica
Plss any recommendations that has a similar plot as this, where seme doesn't like the use and then the uke decides to avoid him, get close to someone else or treat him as complete stranger then Later on the seme gets jealous or gets concious of the uke