Makina isn’t NTR.

It's just corruption since the FMC isn’t in a relationship.
Survival Mission Z is pretty decent, though girl still falls way too fast like typical RPGM games. Like second or third scene she's already corrupted and liking it. *cries*
My definitions of NTR are pretty strict though. I don't even consider Scars of Summer a true NTR because nothing really feels "stolen." FMC doesn't show strong feelings for MC and the MC is sorta wishy-washy in his actions.
And yes, NTR stories are almost always better with less characters. Adding an extra character is a HUGE investment. For example, I'm still paying for the sins of adding Shiori (second FMC in my game). It takes up a LOT of voice lines, art, and resources to add her in without diminishing Akari's presence. But I love both FMCs, so…
View attachment 4758828
View attachment 4758829
But yeah, there are always people bitching not having enough characters. For example, I got complaints about using silhouettes instead of having drawn NPC sprites… like it doesn't cost me hundreds per character.
I promise you, if I get $5k/month, I will get hand-drawn NPC sprites hehe. But not when I’m barely staying afloat! T_T