Krystol was tired of the endless heaven. Sometimes it became too good and too sinless. He wanted a change of scenery so he switched to his human form called 'Tom' before entering the mortal world. Growing up, he had wondered what the mortal and underworld were like, but he had been scalded for mentioning the idea to his parents. This would be his first proper day escaping to the more interesting world, although he had briefly been out before.