4girls, alternate_costume, bad_pixiv_id, blonde_hair, breasts, cleavage, deformed, hug, hug_from_behind, ichinose_shiki, idolmaster, idolmaster_cinderella_girls, jougasaki_mika, jougasaki_rika, long_hair, medium_breasts, miyamoto_frederica, multiple_girls, pink_hair, shisotex, siblings, sisters, sweat, sweaty_clothes, two_side_up, yellow_eyes