One day after starting to live together with my girlfriend, her older sister, Fuua, suddenly decided to stay over at our place for seven days. Tall and mature, with an aura completely different from her younger sister, she exuded a sophisticated charm. As time passed with her under the same roof, I gradually let my true feelings surface, careful not to let my girlfriend find out, and our relationship slowly turned physical. A seven-day adventure fueled by irresistible desire, tainted with guilt. These days weave together the thrill of keeping secrets in everyday life and the intense pursuit of forbidden pleasure—seven impulsive, deeply passionate days.