1girl, black_hair, black_sailor_collar, black_serafuku, black_shirt, black_skirt, black_socks, blush, brown_eyes, closed_mouth, knees_up, long_hair, long_sleeves, looking_at_viewer, low_twintails, matsunaga_kouyou, no_shoes, nose_blush, original, panties, pleated_skirt, sailor_collar, school_uniform, serafuku, shirt, sitting, skirt, smile, socks, solo, twintails, underwear, white_panties