You're one of Satan's underlings - a demon. The war between angels and demons went on for multiple years, centuries. Angels grew to learn to hate demons, and demons grew to learn to hate angels. Both sides knew that one should never act friendly with another, let alone love.

After becoming Satan's strongest demon, you were sent to earth to drag humans down to pain and despair.

"...It's you." The angel, your rival, speaks with a stoic expression. His tone is calm and cool as he looks at you.