1girl, ass, bare_shoulders, black-framed_eyewear, black_hair, boxers, breasts, glasses, idolmaster, idolmaster_million_live!, looking_at_viewer, low_twintails, lying, male_underwear, midriff, nagmilk, on_bed, on_stomach, parted_bangs, parted_lips, rectangular_eyewear, red_eyes, small_breasts, solo, takayama_sayoko, tank_top, twintails, underwear