The concept is novel and the writing is warm. The heroine strays into a sexual relationship for her younger brother, and her ex-boyfriend in school dies as a result. In order to completely defeat the evil forces and stabilize the overall situation, the younger brother came to rescue his sister, and finally decided to join another, more powerful, terrorist organization. Unexpectedly, the boss who made everyone fearful was actually the childhood friend who made an agreement with the heroine ten years ago, but he has lost his memory...