What if a spell you chanted turned out to be real and you accidentally summoned the demons of the 7 deadly sins? Will you cower back in fear and leave the world to suffer on its own or go out of your way to fix your mistake? "Kang Jisoo, 18 years old, Amateur Caster, Demian University student and a High School Junior, am I right?" "W-what? W-who are you?" "Saeron, 108th angel of the 21st division, I have come to deliver a message to you from the Dominions. "