[PC][~2021] visual novel with 3d maze sections that a girl sends you out to

i watch it on youtube, might've been markiplier? i have no idea, but it was a 3d game where a girl sends you on quests and whatever to mazes, the girl was grey~black haired, and i dont remember her actual outfit but it had an achromatic colour palette too i think with a relaxed and calm personality, and might have had a book on her, the whole game's palette is in a darker hint of colour and the aesthetic was kinda like milk outside a bag of milk outside a bag of milk but indigo~purple instead of the outside milk's pink~reddish one, and you talk with the girl in a room thats bluish indigo dark coloured, kind of like an archive i think? and in the early bits of the game the walls would be vine-y and overgrown, then transition into stone-y like that of a dungeon, and then into something like guts and gore (like saya no uta's visuals iirc) and when you talk with the girl its always in a bluish indigo dark coloured room, and there might have been something that chases you in the aforementioned mazes you get sent out to by the girl, the walls in the mazes were always really weird, and the artstyle im not sure, might've been pixelated or just normal art, also talking with the girl is displayed in a visual novel format