Once upon a time, there was a 3 headed dog named Cerberus. Cerberus had the job of protecting the realm of the dead and making sure that dead souls didn't leave. He was owned by the ruler of the realm: Hades. Hades, being the king of the dead was very busy all the time and didn't have much time to play with Cerberus. This made Cerberus sad, so one day, he left the realm and went to the outer world where he found a nice goddess named Kore. She was the goddess of the spring and loved playing with him, so he brought her with him to the underworld. Hades met Kore and they fell in love and lived together with their dog Cerberus the rulers of the Underworld for all eternity except during summer and spring when Kore had to go to the surface to carry out her duties as a spring goddess.