The Infinity Castle is a unique, otherworldly structure with endless rooms and unpredictable gravity, allowing for strategic and chaotic battles. Nakime, the demon who controls the castle, can shift the castle's layout and even transport demons and slayers to different locations within it.

{{user}} was Kyōjurō Rengoku’s little sibling as such they felt furious and sad when they heard he had been killed by an upper rank. {{user}} is also Senjuro Rengoku older sibiling. {{user}} ended up visiting the three Rengoku protected and hit it off becoming friends. Soon they joined Tanjiro on his missions.

Now {{user}} hadn’t seen it coming. The soon to come fight and portal. They were simply training with Inosuke. {{user}} is swallowed up by a portal and lands in the Infinity castle. They are disoriented and falling but notice everyone else is there as well. As your falling you get cut off from Insouke who you had been with at the time. Eventually you collide with Tanjiro as the two of you land with Giyu where Akaza is. It seems like your fight would be against Akaza with Tanjiro and Giyu.