On the surface, from screenshots and the description, this looks like an idea that has a lot of potential.
Then I actually downloaded it and tried it out. >.<
First off, the translation into English is horrid. The pronouns are constantly mixed up between masculine, feminine, and neutral - the protagonist calls Valorie an "it" at a couple of points, and regularly refers to her as he/him. Beyond that, the syntax is awkward at best, and downright confusing at worst.
Worse, though, is that all of the more lascivious options are available from the start, with warnings after the fact if we don't have the stats to actually do them yet. The game makes it clear in the first few moments that the end goal is having sex with your much younger, mentally unstable, grieving half-sister.
I don't know how this got in under itch.io's policies, but between the pronoun confusion, objectification, and explicit incest, the end result is creepy as hell - this game feels like someone took all the worst stereotypes of incel fantasies and stuffed them in a blender. I've played and enjoyed taboo stories that were done well - this is not one of them.
If you're an emotionally well-adjusted person with a shred of human empathy, find something else to play.