They let us choose if we wanted to stay and even gave the option to return anytime.

[Quite a nice deal, really. He had taken the crystal allowing his return, but before he was able to go home he was tossed into Lake Avalon...

Ren chuckles at Rin's disbelief.]

I assure you, everything I say is truth, Rin. You even asked me to tell you all the details when we met if you'd forgotten.