Agreed, i really pity the uke. He just want to be in a good relationship with the top, but his partner are selfishly want to hide the fact they're in the relationship. I know its not kind of normalize for man x man relationship but you should not hide the relationship like that. Also, when uke ask "I don't know at this point wether u date me or ur sister" i really feels what the uke trying to say lile why did you always prioritize ur sister so much than ur own partner? In the end the sister don't really care about other than her own happiness. Of course the uke feels disappointed with you and make that kind of action (took a picture of them after making love and sent to the sister) ik its not right, but if he didn't doing it, then they will keep being in that situation
Also, the sister are really too much. Despite the uke telling his relationship with the brother, she decided to close her eye for her own sake happiness despite her brother doing anything for her to be happy. Also, when she playing the family card "i raise you after mom and dad passed away" like gurll, seriously??? You deserve to be in despair. She really deserve that!

I'm sorry but when you're in a relationship, you prioritize your partner because if it's your family that 1st then marry your family, don't drag the uke and make him miserable by hiding him.
I didn't like the sister one bit. Selfish and manipulative.
The uke didn't have to marry the sister but he could've told the brother whats thruly going on even if the brother woudn't have believed him (probably)
And he's ABSOLUTELY right, the sister doesn't really care about her brother
I liked the ending though because no matter the outcome they loved each other.