funamusea (artist), anten (funamusea), funamusea, sutare yume, official art, 1boy, bags under eyes, black pants, black shoes, book, demon boy, demon horns, demon tail, formal clothes, grey hair, hair between eyes, holding, holding book, horns, long hair, low-tied long hair, low ponytail, pants, pointy ears, ponytail, red eyes, sharp teeth, shirt, shoes, smile, suit, tail, teeth, very long tail, white shirt