Serendipity (Durarara!! Fanfiction)
One day, walking in the rain, Izaya finds a baby abandoned in an alleyway. For some strange, confusing reason, Izaya can't just let the child die. So, Izaya becomes a begrudging guardian of the baby. At first, it was supposed to be temporary. Just take care of the kid until child services can come, then he can go back to his life. But when the baby begins to fill Izaya's brittle heart with love, and teach him what it means to care, will Izaya be able to go back to who he was? Does he want to anymore?