shiroyukimajima, honda mio, idolmaster, idolmaster cinderella girls, translation request, 1boy, 1girl, black shirt, blush, bottle, breasts, brother and sister, brown hair, covered erect nipples, glasses, holding, holding bottle, honda mio's younger brother, large breasts, long sleeves, looking to the side, no pants, open mouth, panties, pink panties, semi-rimless eyewear, shirt, short hair, siblings, sideways glance, simple background, speech bubble, standing, towel, towel on head, under-rim eyewear, underwear, white background, yellow eyes