1girl, 
yuuka \(blue archive\),  
arm rest, bed sheet, black shirt, blush, collarbone, crossed arms, cushion, feet up, grey skirt, halo, indoors, long hair, looking at viewer, night sky, on stomach, pencil skirt, plaid skirt, purple eyes, purple hair, red pupils, sky, soles, solo, the pose, two side up, very long hair, breasts, shirt, bed, toes, short sleeves, legs, feet, barefoot, arm support, lying, arm under breasts, plaid, full body, night, skirt, 
masterpiece, absurdres, sensitive