1girl arm_behind_head artist_name bad_id bad_pixiv_id barefoot bathtub blue_eyes blue_hair blue_skin blush breasts colored_skin commission feet hair_tie large_breasts legs_together legs_up long_hair looking_at_viewer monster_girl nipples nude open_mouth original shiny_skin simple_background sketch slime_(substance) slime_girl soles solo tesomu toes very_long_hair white_background