serino itsuki, z/x, official art, 1girl, ball, bikini, bikini top under shirt, bikini under clothes, black bikini, black ribbon, breasts, bucket, copyright notice, fang, hair ornament, hair ribbon, hairpin, holding, holding hose, hose, long hair, looking at viewer, medium breasts, nei (z/x), one eye closed, open mouth, pool, red eyes, red hair, ribbon, rubber duck, see-through clothes, see-through shirt, shirt, shovel, sitting, solo, sparkle, splashing, spraying, swimsuit, twintails, wariza, water drop, white shirt