1girl, ass_visible_through_thighs, bikini, black-framed_eyewear, blonde_hair, blush, book, bookshelf, breasts, cleavage, clothes_lift, collarbone, cowboy_shot, day, glasses, hair_between_eyes, hair_flaps, hands_up, haruki_(haruki678), heavy_breathing, ibuki_tsubasa, idolmaster, idolmaster_million_live!, indoors, large_breasts, lens_flare, lifted_by_self, long_sleeves, looking_at_viewer, navel, open_mouth, pink_sweater, red_eyes, short_hair, skindentation, solo, string_bikini, sweat, sweater, sweater_lift, swimsuit, thighs, window