Identify An old game

[frozen._.bottle]

There was this one game where the MC gets hurt near the thigh and the step-mom applies ointment to the groin area. While doing so, gets aroused.
It was quite an old game. If I remember properly, the MC had moved to the step-mom's house or something like that and had a sister who did not like him.

 

[picobyte]

I think I know the game, not the name yet, though. Was it about that you (the protagonist) used to live with your father who recently died, so you return to your mother, but more for revenge. She had left him. Something about a Dojo near your father's grave, where you fought someone. It was probably a ren'py game.
Maybe the game was named corruption, or at least art style a bit like it?