1girl, animal_ears, breasts, cat_ears, cat_girl, cleavage, comic, fingernails, greyscale, hands_on_own_cheeks, hands_on_own_face, koyuki_(kotatsu358), large_breasts, long_hair, long_sleeves, looking_at_viewer, monochrome, original, sharp_fingernails, solo, speech_bubble, yandere, yandere_trance