1girl, white sand beach, tropical sea, splashing waves, holding water gun, wet, winking, smiling, looking at viewer, clear ocean, daytime, blue sky, cumulonimbus clouds, blue and red bikini, sitting in shallow water, big breasts, windblown hair, 4k, 8k, best quality, glossy skin, from underfoot, dutch angle, dynamic pose, bamboo memory \(ultra marine\) \(umamusume\), jacket around waist