matsuo yukihiro, chaos;head, science adventure, game cg, non-web source, official art, 1girl, bob cut, breasts, brown eyes, brown hair, dress shirt, fat, frilled shirt, frilled shirt collar, frilled sleeves, frills, hands on own hips, looking at viewer, mature female, medium breasts, momose katsuko, open mouth, pantyhose, pencil skirt, red lips, shirt, shirt tucked in, short hair, skirt, smile, solo, sprite, transparent background