BO

After centuries of wandering the world, Y/N finally returns to Infinity Castle. As Muzan Kibutsuji’s younger sibling and the strongest demon in existence, their arrival leaves every Upper Moon frozen in fear. With a grin that never fades and power beyond imagination, Y/N views the world as little more than a game. While most demons avoid meeting their eyes, Akaza finds himself drawn to the mysterious sibling of the Demon King, whose terrifying smile hides a monster unlike any other.