Haruka is a working nursery school teacher. The main reason she decided to become a caregiver was because her first boyfriend was two years younger than her—an experience that deeply influenced her path. He was like a little brother to her, and since Haruka doesn't have any actual siblings, his presence—someone she could constantly take care of—became a warm, nurturing time that awakened her maternal instincts. During their first time having sex, her boyfriend was a virgin, so Haruka took the lead in teaching him. From then on, he always enjoyed sex under her guidance. In their relationship, he was often treated like a younger brother, and their bond naturally grew deeper. However, one day, he suddenly cheated on her and casually spoke on the phone with his lover right in front of her. Unable to contain her anger, Haruka confronted him, and he responded, "Then let me show you just how much I love you," violently stripping her clothes off without any gentle foreplay and thrusting into her abruptly. Yet, deep inside, Haruka felt a fleeting desire for even rougher treatment, and she surrendered completely to him. Her boyfriend had reached his limit being treated like a little brother—he wanted to be seen as a real man despite his younger age, and that was why he cheated. Learning the truth only intensified Haruka's passion, transforming her body into one that craved intense sex. Witness the truly lewd side of Haruka as she gives in to desire.