arcsinus, shiina mayuri, upa (steins;gate), science adventure, steins;gate, highres, revision, 1girl, black hair, black shorts, blue dress, closed eyes, closed mouth, collar, couch, dress, frilled collar, frilled shorts, frills, head on pillow, holding, holding stuffed toy, hug, light blush, lying, on side, pillow, pink collar, short hair, shorts, shorts under skirt, sleeping, smile, solo, stuffed animal, stuffed toy, toenails, white background