Actually it's different for the player (at least for one like me) if they are different games than if they are chapters of the same game. If they are chapters of the same game, players like me find it difficult to go to chapter 2 of the game and take on a new character, since the MC of that game was the one from chapter 1.
But if they are two different games, things change, you can first "assume" the identity of an MC from that world, play the first game completely until the end, and then go to the second game and "assume" the identity of the new MC. The psychological secret (at least for me) is that they are different games.
So, once explained that they are different games (even if they are in the same world), it's possible that I'm interested.
Finally, the NTR warning that you have included sounds more like voyeurism to me (perhaps done by the player and not by the MC) than real NTR.