I know you said netorare or netorase, but I will say this anyway:
Im still on the road of 100%ing the game Winter Memories, and Im really enjoying the game atm.To put it simply, a Winter Memories game but solely focused on netori genre with a lot of hidden sex in it. You can even incorporate the Husband noise mechanic from the game to make it even better.
Basically, In Winter Memories, you cant do any sex activites when the husband/father is in the room with the heroine.Remove that restriction ,and add the hidden sex mechanic in it. Also, shota as the mc is ok for me, but it would be even better if it's a teenager or any netori adult male stereotypes.
As for ntr parodies, Tomo-chan wa Onnanoko! is a great choice. It's a decent anime, but the setup is already there for
ntr devs/artists to easily play with. It's like an anime begging to be ntred so badly if Im being honest. Esp with a heroine that looks like this:
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