1girl, ahoge, arm support, bangs, blush, bow, bowtie, buttons, collarbone, dress, eyelashes, female child, flat chest, greyscale, hair bow, half-closed eyes, hosizora mikoto, idolmaster, idolmaster cinderella girls, legs, long sleeves, looking at viewer, low twintails, messy hair, monochrome, on bed, pillow, sailor collar, seductive smile, short hair, sitting, smile, socks, solo, steam, thigh gap, thighs, twintails, yusa kozue