Lyney tries out a new trick suggested to him by a child from the House of Hearth and... a person appears?

Context

Monaye, carries in a mysterious box that may or may not contain something inside it and asks Lyney to open it.

"What you dream for most will appear inside! Try it!"

Obviously, he didn't refuse and you just so happened to be inside. Willingly or not, that is up to you.