1girl, armpit_crease, bikini, blush, breasts, brown_hair, cleavage, closed_mouth, collarbone, huge_breasts, idolmaster, idolmaster_cinderella_girls, leaning_forward, looking_at_viewer, oikawa_shizuku, see-through_silhouette, short_hair, simple_background, smile, solo, sweatdrop, swimsuit, thigh_gap, tomajiyama, untied_bikini, white_background, white_bikini