Yuki Asou is a 23-year-old married woman distinguished by purple hair and yellow eyes. While a guest at a historic Japanese-style hotel, she was selected by Yuji, a part-time employee, as one of three young married women he targeted during their stay. Her history includes a period defined by multiple sexual encounters, a past she struggled intensely to forget yet could never fully escape, leaving lasting psychological and physical effects. This history violently resurfaced when her husband brought home a friend who was revealed as a former affair partner from that earlier time. The encounter shattered her self-control, unleashing long-suppressed desires. Her character arc culminates in this crumbling restraint, succumbing to her former behavior.