Welcome to Demon School! Iruma-kun: If Episode of Mafia (also known as IruMafia Edition) is an action, comedy, and slice-of-life manga spinoff based on the beloved Mairimashita! Iruma-kun series. Set in a gritty alternate universe, the story follows young Iruma — a dirt-poor but endlessly cheerful boy living in a ruthless city slum — who one day offers his last loaf of bread to a gravely injured old man. That stranger turns out to be Don Sullivan, the powerful leader of the Babel Mafia, who is so moved by Iruma's kindness that he adopts him as his own grandson.

What makes this spinoff truly special is how it reimagines fan-favorite characters from the original series through the lens of organized crime, blending sharp comedy with genuine heart and pulse-pounding action. The mafia setting adds unexpected depth — exploring loyalty, family, and survival — while never losing the warm, lighthearted spirit that made Iruma-kun a fan favorite. It strikes a rare balance between laugh-out-loud moments and emotionally gripping storytelling, making it a standout among manga spinoffs.

Now completed, Welcome to Demon School! Iruma-kun: If Episode of Mafia is a must-read for fans of the original series and newcomers alike. Whether you love underdog stories, found-family dynamics, or action-packed comedy manga, this spinoff delivers on every front. Read all chapters free online in high quality and experience one of the most creative alternate-universe manga spinoffs in recent memory.