mitterfly, phantom (arknights), arknights, commentary, highres, symbol-only commentary, 1boy, animal ears, ascot, book, cat boy, cat ears, cat tail, collared shirt, cropped legs, curtained hair, english text, extra ears, from behind, from side, gloves, greyscale, hair between eyes, hand up, holding, holding book, long sleeves, looking at hand, looking up, male focus, monochrome, multiple views, music, musical note, open book, open mouth, pants, popped collar, profile, reading, shirt, short hair, simple background, singing, sleeve cuffs, solo, standing, tail, upper body, vest, white background