If you are looking specifically for the psychological "heartbreak" or "betrayal" themes found in NTR, these games offer different takes on the genre.
Choice-heavy interactive fiction with sharp 2D visuals and deep progression systems where your decisions fundamentally corrupt or protect the characters. 2. Seeds of Chaos game like ntrman
Some players prefer the perspective of the "antagonist" (the other man ), known as NTL (Netorase), or games that blend genres. If you are looking specifically for the psychological