We all know the story of the human boy that has saved the demon world countless times and took the Netherworld by storm, but what if the story took a much darker turn? Iruma's fear of those around him getting hurt takes him down the wrong path, one that Baal had anticipated all along... So what will happen when Iruma goes down a darker path...? (This plot line is centered after the Deviculum arc and contains SPOILERS ⚠️ for the manga)

『Welcome to Demon School! Iruma-kun Fanfic』 Suzuki Iruma, a child who suddenly got abandoned by its own parents. Meet an unexpected person named Sullivan, whom the lonely boy just reach its hand for help now. As payback now the old wants him to be his grandson. Little did he know something will be awaiting for him behind the doors of a Mafia Organization