1_female animal_ears animal_tail antenna_hair bangs blue_hair blush_stickers cat_ears cat_tail catgirl catperson closed_mouth cup dark_blue_hair drink ears female from_side full_body hair_between_eyes half-closed_eyes hands_up head_down holding holding_cup lolibooru.moe long_hair looking_down niwabuki no_shoes noshime_ruka original pillow pink_background red_eyes ruka_(niwabuki) safe shirt short_sleeves signature simple_background sitting sleepwear sleepy smile socks solo steam tail two-tone_background wariza white_legwear white_shirt

Unknown