urotan, amao mashiro, nishina kotori, utsuho tsugumi, night wizard, night wizard mahou taisen, 00s, 3girls, :p, back, backless outfit, bikini, blonde hair, blue eyes, blue hair, blush, breasts, casual one-piece swimsuit, cleavage, covered erect nipples, front-tie top, green eyes, groin, hair ribbon, halterneck, hammock, innertube, large breasts, long hair, lying, medium breasts, multiple girls, navel, nipple slip, nipples, on back, one-piece swimsuit, open clothes, purple hair, red hair, ribbon, shading eyes, shirt, short hair, sitting, smile, swim ring, swimsuit, tongue, tongue out, untied bikini, water