sasaki mutsumi, shitenno uzuki, happy lesson, brown footwear, 00s, 1girl, ;d, blonde hair, blush, brooch, closed mouth, feathered wings, fingernails, from behind, gem, hair ribbon, jewelry, long hair, long sleeves, looking at viewer, looking back, miniskirt, multiple views, multiple wings, no socks, one eye closed, open mouth, purple gemstone, red ribbon, ribbon, shoes, sitting, skirt, smile, twintails, very long hair, white skirt, white wings, wings, yokozuwari