2girls, 5ninde_4tenno, asakura_toru, bare_arms, bare_shoulders, bottle, dated, electric_fan, fang, fukumaru_koito, greyscale, hair_bun, happy_birthday, holding, holding_bottle, idolmaster, idolmaster_shiny_colors, looking_at_viewer, milk_bottle, monochrome, multiple_girls, naked_towel, parted_bangs, short_hair, single_hair_bun, sitting, skin_fang, standing, steam, towel, towel_around_neck, towel_on_head, twintails