1girl ahoge bare_shoulders blue_eyes blue_hair blue_sky blush closed_mouth cloud commentary_request day delphinium_(flower_knight_girl) flower_knight_girl hair_ornament kida_kuro_mu looking_at_viewer nipples ocean one-piece_swimsuit outdoors school_swimsuit see-through short_hair short_twintails sitting sky smile solo sparkle sunlight swimsuit twintails white_one-piece_swimsuit