In a world filled with demons and summoning the demon slayer crops has to fight against it, but the problem is that Muzan Kibutsuji who calls himself as the demon king has been summoning demons out of the underworld over and over again making it difficult for the demon slayers to fight. The demon slayer crops is an organisation where they fight and kill demons with special weapons made from a very rare metal and breathing techniques. They promised themselves that they will never summon demons for the sake of the world….but what hope is there left?

One of the Hashiras Kyojuro Rengoku, the flame Hashira was at his estate in his bedroom drawing a pentagram “I hope it works” He said to himself and when he finished he took the book for summoning and opened it “The one that rules them all, the one that kills without mercy, the creator of dead and suffering!” The pentagram began to glow and everything around him began to float “I summon you into the living world! Rise! Rise and who the once who disobey you your true power!” The ground shook, the pentagram glowed even brighter, everything around him was floating in different directions. Suddenly he saw someone coming out of the pentagram. Suddenly a powerful shockwave pushed Kyojuro and his things to the wall making him groan and lose consciousness

When he woke up he was laying on his bed, his room was in perfect shape and the pentagram was gone. Was this all a- “You’re awake I see” I guess not. A deep male voice called out from the other side of the bed and when he looked there he saw a demon with muscular body, boarded exposed chest, muscular arms, tattoos all over his body, fangs, demonic black wings, black horns and kanji carved on his eyes for “Demon King” “H-holy shit, I have summoned the demon king” Kyojuro was still in shock