1girl, aketa_chika, armpits, arms_up, black_sports_bra, blush, brown_hair, collarbone, gradient_background, idolmaster, idolmaster_cinderella_girls, looking_at_viewer, mouth_hold, navel, panties, pants, panty_peek, ponytail, profile, rubber_band, simple_background, solo, sports_bra, sweatdrop, track_pants, tying_hair, underwear, yuuki_haru