1boy, 1girl, ahoge, bad_twitter_id, barefoot, blush, brother_and_sister, brown_eyes, brown_hair, collarbone, day, fence, flat_chest, flower, full_body, hair_between_eyes, hand_up, holding, holding_water_gun, honjou_ruri, honjou_satoru, honnryou_hanaru, kneeling, long_hair, looking_at_viewer, original, outdoors, parted_lips, partially_submerged, plant, purple_flower, ribs, shirt, shorts, siblings, sitting, sleeveless, sleeveless_shirt, striped, striped_shirt, striped_shorts, topless_male, twintails, wading_pool, water, water_gun