4boys, 4girls, animal_ears, bare_shoulders, breasts, cleavage, collarbone, furry, furry_female, furry_male, glasses, goggles, goggles_around_neck, greyscale, hat, helmet, long_hair, looking_at_viewer, made_in_abyss, medium_breasts, monochrome, multiple_boys, multiple_girls, navel, original, parted_lips, pointy_ears, smile, tail, tsukushi_akihito, twintails, whiskers