Here's my thing:
I don't mind grind.
But just like when I'm playing Path of Exile or something, you need to make the grind enjoyable. In PoE, that means seeing a build come together and using it to delete a screen of monsters and collect loot.
For a sex game, that should mean that there's an enjoyable build up to whatever the climax of the grind is (hehe get it). Spamming conversation choices and watching arbitrary point values go up/down while clicking through bad dialogue is not gonna cut it. The grind still needs content: actual good and varied dialogue that pushes the story toward something, and actions like teasing, tense situations, groping, etc. that build up to the sex.
On the art: I don't mind the filter, but it's not good.
That said, I will leave on a positive by saying that the animations here are pretty nice! Much better than the usual slideshow or crappy not-complete loops people tend to make.