gosh cant believe ive got blue balled by a mid game, the ntr is far for unavoidable, its actively AVOIDING you, the guide doesn't care either, and the guys here gave little to helpful answer, the only one getting ntr-ed is you, yeah not the character but YOU, coz even YOU dont get to see any ntr happening, imagine the lashout if there is no gallery, and player need to trigger to get any scene, that would be a hell to pay, but luckily we got gallery coz damn, if i can trigger any ntr except the first torture rape scene, i will buy a lottery
Because there isn't much. The game is mostly for a cool protagonist, and NTR feels
really out of place, you have to seriously get out of your way to get them. Feels unnatural for this kind of protag, and it has no consequences on your relationships either, so i guess dev just added them for that super-popular tag.
Scenes are hiding from you, but simple to get if you know how - just get your buddy to max lewdness(parade her around naked and talk to men, or go the bathhouse together) and i guess fuck her a few times, otherwise she will never ever agree or get caught. The catch is... scenes are mostly NETORASE, you agree to lend her to other guys. There is, as far as i know, two actual netorare scenes, the ones where she gets raped into consensual sex in shared inn room, and Mirei marriage scenes. Anyway, after lewdness just:
1. Find guys with a musical note symbol, they offer to take your girl
2. Let your girl sleep in a shared room at the inn.
Also, gallery lies to you a bit. Some scenes are done in overworld, with character models and text, without pictures.
You'd enjoy this game much more if you treat it as a normal male protag game, and not a game with NTR tag.