Gucci did a test online and said that his psychic index is 99, and he can see ghosts whenever he wants. So on a whim, he recited a spell, but he didn't expect to summon the devil. He also made a contract with him and became his eternal servant.
Gucci thought that the devil was very obedient, but he didn't expect that the devil is still a devil after all and cannot change his evil nature!