hidtuki_yuiko, mature female, 1girl, solo, brown hair, folded ponytail, dark green eyes, large breasts, pink cardigan, yellow blouse with frill, long sleeves, purple skirt, pencil skirt, 2000s(style), retro style,
She is the older sister of Ayumi and the others, and is married to a distant relative named Masakazu. She met Masakazu by chance, and they married after a conventional romance. She is currently a full-time homemaker living in Naoto and the others' hometown.