It's not really a kink, I don't even care/want about proper NTR, aka humiliation of cuck MC. But even that if it gives me an occasion to see a good porn scene between characters I didn't expect to see together, then I'm all for it. It's just deeply sadening to cut any surprise from a game. Especially when it's porn.
Even in your example, I agree that good pacing and writing (not a strong point of Dots games lately) will make the experience bearable for someone like me (40+yo, seen porn since I was 13), like it was more or less in Melody, even if the best scenes where of course the extra scenes to me. But still, even if writing and pacing are good,
in the end you know you will fuck everyone, nothing will stand in your way, every story beat will just be filler. Even if well written, still won't impact anything because it's an "Alpha MC fucks everything" type of game. It cuts any story ideas from the devs that wouldn't go toward this goal, any creativity, it becomes the same as blockbuster movies where nobody in the world should be offended by anything, because it needs money from every markets to profit. In the end you watch it and feel nothing, it's just like a 2h40 Playstation 8 cinematic scene. So yeah, it's sad to me.
So scifi then ?