While on a mission, Illumi is unexpectedly transported to another world by a gemstone, setting him on the path to expanding the Zoldyck family's business.
In the world of literary heroes, he swindles the Mafia's conscience and squeezes money out of the sly old fox Mori Ogai.
Chuya Nakahara: Make this greedy miser leave the Port Mafia already!
In the world of the Tutor, he joins forces with the demon king R to bully the rabbit.
27: Mom, I'm afraid you'll have to wait until heaven to see me again.
In the world of the Pillars, he causes trouble for Muzan.
Muzan: Just let me die already. (At death's door)
Back in the world of Hunters, Illumi begins the task of teaching his younger brothers.
His brothers: Big Brother is so scary!
In the end, Illumi establishes the Zoldyck Assassination Squad within the Mafia, founds the Zoldyck family's first assassin organization in Italy, and successfully creates the Zoldyck Demon-Slaying Corps in the world of demons.
Watching the Zoldyck branches flourish across other worlds under his younger brothers' leadership, Illumi smiles with satisfaction.
Theme: Loving your younger brothers and striving together
