Hibari Chinatsu has two blessings in her life, one is meeting Orihara Izaya, the other is falling in love with Orihara Izaya.
Orihara Izaya also had two blessings in his life. One was that he met Hibari Chinatsu, and the other was that Chinatsu fell in love with him.
Hibari Kyouya had two major bad lucks in his life. One was that his sister met Orihara Izaya, and the other was that his sister fell hopelessly in love with Orihara Izaya.