1girl bangs blue_sky blush cloud collarbone cowboy_shot highres idolmaster idolmaster_shiny_colors light_particles long_hair looking_at_viewer nira_(vira) one-piece_swimsuit osaki_amana outdoors red_eyes red_hair school_swimsuit see-through shirt short_sleeves skirt sky smile solo swimsuit swimsuit_under_clothes water_drop wet wet_clothes wet_hair wet_shirt white_shirt