The heroine has a gentle and timid character. When she was five years old, she witnessed her biological mother being killed by her father; when she was nine years old, her flamboyant and vicious twin sister pushed the little boy who bullied her into the lake, held his head down, and watched him struggle and sink into the water little by little until the water was calm. No one would have thought that this was something a nine-year-old girl could do; at the age of thirteen, she was her younger sister, and used a trick to kill her father, who killed her mother and often drank and beat herself and her sister. Until he was adopted by his aunt and entered high school. They met many people. Just when the heroine thinks she can get out of the gloom and reach out to the sunshine like a normal person. My sister actually killed him, whom her sister liked, with her own hands. The sins that had been buried for many years were all exposed to the sun, and everyone discovered that the so-called vicious sister was just the self-struggle and self-salvation of the yandere sister. This is not a suspenseful article, just the struggle and sadness of not being able to love.