Clink.

I untied the necklace I was wearing and grabbed it with my hand. There was a key hanging on it by the end. A key with a unique design that seemed as if it was assembled and weaved with dozens of pieces of metals. It was a keepsake left behind by the man that was said to be my biological father.

'Come to think of it, I haven't really thought about what this is used for.'

Seeing that it was shaped like a key, it was most probably used to open something, but I had never really wondered about where I would use this. Because from the moment I came to the universe, there was no such thing as a keyhole anywhere.

In fact, what was in front of me might be the first(?) keyhole I came across in the universe.

"What are you looking at?"

"Oh, it's nothing. It's just, I received a key." I lifted the key as I said so. Just like her earrings, this key was not taken away by the demi-humans and it probably meant that the demi-humans weren't able to perceive it. However, no matter how much I thought about it, the method in which it went undetected was probably not because it became transparent.

Indeed, she could perceive the key that I held in my hand, and her expression turned stiff.

"This is…"

"What's wrong?"

"No, wait. Can you give that to me for a bit?"

"Alright." I handed it over to her meekly. Whatever it was, it wasn't as if she was going to run away with it in the situation we were in...