Sora didn't expect that just because he was fighting the Abyss Mage, he would end up in a strange place inexplicably.
Fox Nosuke: Please, Lord Judge, sign a contract with this Honmaru.
Paimon: It's better to rest here before contacting Grandpa Diluc and the others.
Sora: ... When will we find my sister?
Purpose: A journey of perseverance