I think you’re more on the noise, the only red flag fact is liking the guy who likes your little brother. But it’s a red flag for revolution!!! the little bro is such an ASS-king that he needs to be overthrown!!! lol
I think it is the opposite.
The Seme seems to be interested in him since young, and the jerk brother realised that.
And since the jerk have inferiority complex towards Seme who is perfect in everything.
The jerk try to take Uke away and obsessed to own him (not love him), because only this can make the jerk feels better than the Seme.
The jerk probably think "he will be the only thing that my brother can't get".
Omg, I hope you are right
I hope that this will turn out like "Define the Relationship" where everyone thought ash was double faced bc of his kindness, but he actually really was that kind.
Cause rn I have this gut feeling that the ML is just pretending to like the MC to get back that his brother. Idk somethings off, but I don't wanna believe it