1girl, all_fours, ass, bad_pixiv_id, ball, barefoot, beachball, bikini, black_hair, blue_eyes, blue_sky, bow_hairband, breasts, cloud, dutch_angle, hairband, hololive, horizon, looking_at_viewer, medium_breasts, melow_menow, official_alternate_costume, official_alternate_hairstyle, oozora_subaru, oozora_subaru_(hololive_summer_2019), outdoors, short_hair, sky, solo, striped, striped_bikini, swept_bangs, swimsuit, virtual_youtuber, yellow_bikini