2girls, o, ahoge, arm_under_breasts, bare_arms, bare_shoulders, breasts, brooke_(mathias_leth), dark-skinned_female, dark_skin, greyscale, hair_between_eyes, long_hair, looking_at_viewer, mathias_leth, medium_breasts, monochrome, multiple_girls, naked_towel, onsen, open_mouth, original, partially_submerged, short_hair, smile, steam, stina_(mathias_leth), towel, water