Conspire With The Demon Beast

Being provoked by a co-member of an occult club, Evren, a smart student that believes in demons never thought to train a demon beast after opening the portal of hell. Upon eradicating supernatural event, they met Invidia-a demon beast of Envy. Will they succeeded of eradicating evil on the world or they'll be defeated as they encounter each Forces of Hell Demon Beast and others?