It's not the brother. We'll at least from what I understand in the raws.
The past life arc seems to me that the brother just truly love TaeHyuk. He even disappeared when TaeHyuk died so it's not it. (I hope....)
raws link? :)
Aaaahhhhh!! Epi 69
Cant wait for it to get translated
https://toonkor434.com/%EC%83%88%EB%B2%BD-%EA%B5%AC%EB%A6%84-%EA%B0%95
I wouldn’t call that love, I agree with the author in regard to the brother being obsessive to the point of monopolizing MC in his past life. But yeah, hopefully it isn’t the brother being weird again!
Ahh I hope that’s not his weird ass brother doing weirdo shit again. Also I loved how simple it was for MC to see the purity in how much he love(d/s) Hyo-un across lifetimes even though in this lifetime he gave fuckboy (thus never having any real practice at deeply loving any of his partner’s)