For that scene, you have to be on Maria's Dom path. This scene happens on Day 18 when you go to where she lives.
100 days ago(+1)
I just get it now, my mistake is that in the dom path, I skipped the story of helping her, thank you very much for helping me!
Since I'm talking to the creator, I want to say that your game is amazing, the first time I played it, it took me hours because it's so well written that I didn't skip a single scene. I know that making such a good game takes energy and is time-consuming, but I hope you don't give up, it's an extremely competent job and it's a great experience, I'm sure that if erotic games weren't so taboo, this one would be winning awards in very popular indie game competitions.
Thank you a lot for the amazing work!
