Remilia and Sakuya in the previews are definitely the exact same sprites from Touhou Immaterial and Missing Power...for comparison: https://en.touhouwiki.net/wiki/Immaterial_and_Missing_Power/Characters Hope you guys know that's technically still illegal even in a free product without express permission... (and if someone sold you those as their self-made sprites, that's multiple crimes, lol)...

seriously ask when visual novel always have one

I know this game didn't get a lot of attention.

I'm not super familiar with Touhou, but looking for "Moka" on the Touhou wiki doesn't return any results, so she's an OC?