1girl, d, ass, bikini, blue_sky, breasts, cowboy_shot, day, earrings, eyewear_on_head, from_behind, hair_between_eyes, heart, heart-shaped_eyewear, heart_earrings, holding, holding_innertube, hololive, houshou_marine, houshou_marine_(summer), innertube, jewelry, kitazume_kumie, large_breasts, long_hair, looking_at_viewer, looking_back, official_alternate_costume, official_alternate_hair_length, official_alternate_hairstyle, outdoors, ponytail, red_bikini, red_eyes, red_hair, sky, smile, solo, standing, sunglasses, swimsuit, very_long_hair, virtual_youtuber, water