1girl barefoot bikini blue_hair breasts cleavage commentary_request crossbow full_body hand_on_headwear hat holding holding_weapon jewelry koga_(oshiro_project) long_hair looking_at_viewer medium_breasts navel necklace official_art oshiro_project:re red_eyes simple_background solo standing straw_hat sun_hat swimsuit watermark weapon white_bikini wristband yappen