Rule 34 Dev - 1girl 2d 2d_(artwork) anthro anthro_only blue_body blue_skin border breasts convenient_censoring digital_media_(artwork) ear_fins female female_armpit_hair female_only hair lying lying_on_back lying_on_bed no_visible_nipples noah_(tettsui-sole) noaharbre non-mammal_breasts off_shoulder on_back on_bed open_mouth panties pillow red_hair solo solo_anthro solo_female undertale undertale_(series) undyne video_game_character video_games white_border yellow_sclera|1023996