Sigmund agreed to Lucius' plan to pretend to be a human. Everything had been messed up; Fiora, Gerhalt, and Nathan knew that he and Ivory were lovers, but their registered information showed that they're Master and Servant. Their true relationship is also known by the town guards and officers in the town hall, so what should they do?
There's also this problem: what if the Principal suddenly visits them? He knew very well that he's her Servant! And what if he spoke with the people around them? They'd get busted!
He and Lucius were contemplating on what to do from now on. Since they already discovered where the Dark Mana stones were mined, their purpose should be over, but it would be unfair to everyone if they would not finish their apprenticeship. In three weeks, spring would end and summer would start. They've been Topazeon Town for almost half a year, so it would be such a waste if they would not finish their apprenticeship.