He Couldn't Remove the Mask

Naruto tried to remove the mask, but there was no edge to grab where there should be one. The mask had already completely merged with him, turning him into a her permanently, most likely because Kaguya was much more powerful than anyone else.

"Shit! I can't get remove it! How am I going to explain this?! Better yet, how do I prevent going evil?!" Naruto panicked.

After a few minutes, she finally calmed down and accepted that he can't do anything about it, he would be stuck as the rabit goddess for the rest of his days (which would be allot since she is now immortal).

"Ok, maybe being a goddess is not all bad... I look great and I can feel godlike power coursing through me. I just have to make sure I don't become evil." Naruto resolved to herself, "Time to test what I can do with this power!".

And with that, she formed a portal in front of her and went through, appearing in Kaguya's main dimension.