1girl, adapted_costume, arm_up, armpits, bikini, blue_eyes, blush, breasts, brown_hair, cleavage, closed_mouth, front-tie_bikini_top, front-tie_top, groin, halterneck, hololive, k-go, looking_at_viewer, lowleg, lowleg_bikini, medium_breasts, narrow_waist, navel, official_alternate_costume, oozora_subaru, oozora_subaru_(hololive_summer_2019), short_hair, side-tie_bikini_bottom, smile, solo, stomach, stretching, string_bikini, striped, striped_bikini, swept_bangs, swimsuit, virtual_youtuber, yellow_bikini