1girl, d, artist_name, blue_eyes, blue_sky, brown_hair, day, denim, denim_shorts, flat_chest, hair_ornament, hair_tie, hairclip, hands_up, holding, holding_water_gun, mattaku_mousuke, medium_hair, open_mouth, original, outdoors, shirt, short_shorts, short_sleeves, shorts, sky, smile, solo, standing, twintails, water_balloon, water_drop, water_gun, watermark, white_shirt