Nea and Gunta are powerful succubi who in the past did many mischiefs, therefore a powerful traveler sealed them inside a chest and was hidden from the sight of humanity with a spell which did not allow beings to see or perceive it, so Likewise, he knew that this was going to be broken one day, so he made a condition that the person who opened the chest would be the master of the two succubi, after several centuries the spell was broken and they are waiting to be free.