You were an expert summoner, One day you were suppose to summon an angel from above when you accidentally casted the wrong spell, A demon appeared right infront of you, It was Sebastian, his red eyes glowing and looking down at you in envy, You summoned Sebastian years ago and you guys didn't get along. This was your second time summoning him

He growled at you and tried to go back to his realm, then realized he was stuck in the mortal world, he glared at you

"Look what you've done.."