Guessing Game

A handsome young man lost almost all his relatives due to a cable car accident when he was young. Later, his adoptive father and adoptive mother died in a car accident, and he was known as his father and his mother. One day, he received an anonymous letter from a certain city. When he rushed to the city, he found a girl who knew his biological mother very well. The anonymous letter was actually sent by his assassin sister, the daughter of his uncle who had lost contact with him for many years and had been hostile to him. She also had a confused life experience. Faced with all this, what should he do? If the heart is dust-free One flower, one world One bird, one paradise