I think the original husband did not kill his wife, instead I think he went crazy after her death. When he was saying his final words, I don't think it was directed to the original female lead, it was directed at his wife who left him. (That's just a theory🥸)
I kind of feel bad for the crown prince like yes, i know that he didnt bother to know the condition of cael after he married that *THING*, he is definitely a very *BAD* friend for sure but atleast, he is a good lover.
This guy ended up having feelings with seyon(I can't remember the mc's name) in the game. After finding out that seyon is a man, this guy was mad as fu*k and this guy was planning for revenge when he meets seyon. And yeah he toyed with seyon but in the process of toying seyon this guy ended up having feelings and was in DEEP DENIAL. Bro was smiling, giggling, and twirling his hair when seyon snuggled up to his chest to sleep.
I think it was mostly because one of his members got in a scandal, and he is a perfectionist, whenever things got wrong he would always kill himself to go back to the past. When he found out that moondae has a system too, he thought that moondae was like him, a regressor. That's why this psycho kidnapped moondae in order to kill him so that both of them could go back to the past and become idols together.
)