good quality, 1girl, aqua eyes, aqua hair, aqua nails, arms up, bare shoulders, black skirt, black sleeves, black thighhighs, blush, by pentagon railgun ky1206, curtains, detached sleeves, from behind, grey shirt, holding hair, looking at viewer, looking back, mouth hold, nail polish, pleated skirt, sleeveless shirt, solo, tattoo, twintails, very long hair, zettai ryouiki