Oh! You might be right, but I interpreted it differently. Well, I agree with most of what you say - I never like it in stories where the person is having flings right in front of the person they're supposed to be in love with. What I interpreted differently was that he could see it would end badly. He definitely thought that at first, but I thought that afterwards, although he hadn't built up the trust YET, he was willing to believe the other guy's sincerity and that trust might be built in the future. (And I felt that the line he said about not trusting him forever was more of a cheeky throwaway thought meaning that he intended to keep him by his side wooing him for life.) Maybe that was optimistic of me, but it makes me happier to go with an "it'll all turn out alright" interpretation, hehe.
I kinda agree with you there lol it just shows how much of a good guy (and how whipped he is for his love sighhh) the uke is (￣∇￣") Tho we all know the seme's a good for nothing brat that'll probably cheat on the uke in the future. Can we at least I wanna see the seme gets dumped by the uke or smth sighhh ╮(￣▽￣)╭
damn the first time reading a story where the uke completely acknowledges they've fallen for a playboy and know the consequences will end badly. The seme is definitely going to cheat on him likely in the future you can just tell ( his i just have charm and go with the flow of being a homewrecker excuse nailed that; he takes pride in it as you can see) and that really sucks I REALLY hate the whole I love you and I continue to flaunt sleeping with other people in front of you. It might be different because the uke feelings were unknown but even had they been it highlights you really enjoy pleasure and momentary gratification. When you're not in a committed relationship you can sleep with anyone you want, but it somehow cheapens your feelings for the other party when later you reveal said feelings and had been pursuing others the entire time in front of your love interest's face with not even a hint of tactfulness. It really makes the other party feel uncertain about your definition of intimacy and especially how you'll be the sort to want be able have your cake and eat it too, meaning be a man of habit and enjoy the pleasure you've received till now. Actually have seen friends in similar situations and it always ends badly.