You and I both know that if I return to my world, I shall be a fugitive. I will be unable to practice my calling, regardless of my skills and intentions. But in this place, my services appear to be greatly needed, and though I expect I will be watched closely especially at first, I still believe they would be welcome. That is the first reason.

The second reason is the chance to earn back my sister's life. And the third is the chance to regain my youth, so that I will have more time and energy for her.