1girl, axylon, barefoot, beach, bikini, black_bikini, breasts, cleavage, elysia_(honkai_impact), frilled_bikini, frills, hair_down, honkai_(series), honkai_impact_3rd, innertube, long_hair, looking_at_viewer, lying, on_back, outdoors, pink_eyes, pink_hair, sand, solo, swimsuit, wading, water, wet, wet_hair