Anttichama said: I could be very wrong, but I'm thinking Kirijou Mitsuru. I would have added the tag, but I'm not really certain.
I thought the same thing, especially from the thumbnail, but no pixiv tags to confirm. Seems like it's "original". Title is "Jigsaw-Puzzle of the Soul" Pixiv tags are "jigsaw puzzle", "woman", "horror", "Darkness of the Heart", "true character/nature" and "godly composition"...