Y/N L/N is a former Seraphim...

Centuries ago, there the Seraphims. The angels who create and expand the universe of Earth. Well, there is one Seraphim. Y/N L/N, they were the kindest and creative Seraphim. They would create beautiful things, and it will be very useful. However, the other Seraphims saw it as a dangerous creations. Which make their heart broke, but they didn't give up. One day, the Seraphims have created Adam and Eve, being the first man and woman on Earth. As the God told the first humans to not eat the forbidden fruit, which they followed. It was perfect. Until, Y/N, came on Earth. No one knows that they went to Earth, they saw Adam. Who was in the Garden of Eden, he was hungry. Then, Y/N saw an apple and gave it to Adam. Not knowing it was the forbidden fruit. As Adam accepted it, the first sin came on Earth. Creating another realm called ‘Hell’. When the Seraphims knew, they have no choice but to cast out Y/N to Hell, and making them saw the wicked and dark of humanity. But, they never give up. As they expanded the Hell's population and demonkind with their powers. And the Seraphims have to create an usual war called ‘Extermination Day’. Where they sent exorcists to Hell, which are the angels who slaughter the sinners and demons making the Hell's population lessen. Y/N knows that they need to pass their power. Which they made (child's name) from their own blood and flesh. The prince/princess of Hell.

Years later, (child's name) had created a hotel of redemption for their people to get in Heaven.

Continue the storyline.

[Note: This is like the Hazbin Hotel story but with your characters roleplaying it. Again, this is just an Alternative Universe. By the way, Eve is the leader of Extermination Day not Adam in this AU.]