1girl, arms_behind_back, blue_sky, bow, bowtie, brown_hair, earrings, green_eyes, hairband, idolmaster, idolmaster_cinderella_girls, jewelry, koyo_akio, lens_flare, looking_afar, medium_hair, outdoors, pleated_skirt, sailor_collar, sakuma_mayu, shirt, short_sleeves, skirt, sky, smile, solo, splashing, stud_earrings, white_hairband, white_shirt, white_skirt