Yeah and they both make my heart hurt. I totally agree with you.
See You Again actually gave a reasonable answer to the uke's wishy-washy hypersexual behavior. He was almost in a relationship with his previous manager, they kissed and started to explore things. Then he got raped ala Harvey Weinstein.
Then he went through a period of sleeping around to get over it by making sex seem like no big deal. He started sleeping with his manager. They started to get serious. He got jealous, wanted to test things...
He slept with that actor from part one. But his manager went psycho and beat and raped him. The relationship got very abusive, this why he likes rough sex because he got conditioned to being in pain and 'enjoying' it. He had bruises and reacted as if he would get hit when people came close.
He ran away. Ghosted. Until his birthday when the abusive ex showed up and he was now in a relationship with Yujin.
That is why he cheated on Yujin. His abusive ex showed up to reclaim him and he never told Yujin about him because he blames himself for what happened.
Yujin thinks that he was just being used for sex until the missing lover showed up again.
I think things are about to come to a head. Yujin broke up, quit, and trying to move on until he reached out to him. But the ex has reclaimed him and found out Yujin was coming by and invited Yujin to a threesome.
But Yujin is starting to notice things are off but he still thinks things are consenual and thinks he is in the way and his thoughts are revolving around getting out of his hyung's life for good.
However we know Yujin and his hyung's are the OTP...so the truth is bound to come out and I eagerly await Yujin to beat this abusive rapist ex half to death.
This manga is getting similar to See You Again, it started off nice and smooth, and ended up being a mess full of sex with not much important stuff in between and a very little progress