2girls, alcohol, aramachi, bath_yukata, bottle, breasts, brown_hair, cleavage, collarbone, hand_on_another's_head, hugging_object, idolmaster, idolmaster_cinderella_girls, indoors, japanese_clothes, kimono, lap_pillow, large_breasts, lying, mifune_miyu, multiple_girls, ponytail, sake, sake_bottle, single_bare_shoulder, sleeping, solo_focus, tatami, yukata