How did Pluto end up living in the underworld?

In Roman mythology, Pluto, originally known as Hades in Greek mythology, became the god of the underworld after the defeat of the Titans. Following this victory, the three brothers—Zeus, Poseidon, and Pluto—drew lots to divide the realms of the universe. Pluto was assigned the underworld, where he ruled over the dead and presided over the afterlife, often depicted as a dark and shadowy place. This narrative reflects themes of death and the afterlife in ancient mythology.