1girl, o, blue_eyes, blue_hair, blush, breasts, chestnut_mouth, from_side, hair_bun, holding, hololive, hoshimachi_suisei, knees_up, looking_at_viewer, looking_to_the_side, medium_hair, naked_towel, onsen, rock, sidelocks, sitting, soap, solo, star_(symbol), star_in_eye, symbol_in_eye, towel, virgo76612871, virtual_youtuber, water