2girls, bath, black_hair, blonde_hair, blunt_bangs, blush, breasts, cleavage, collarbone, covered_navel, dutch_angle, futou_ryouko, head_rest, idolmaster, idolmaster_cinderella_girls, kurosaki_chitose, lantern, looking_at_viewer, medium_breasts, moon, multiple_girls, naked_towel, night, night_sky, ofuro, ponytail, purple_eyes, red_eyes, reflection, reflective_water, refraction, shirayuki_chiyo, sky, small_breasts, smile, steam, sweatdrop, towel, velvet_rose_(idolmaster), wet