C541 The Riddler Is a Bad Habit

On the first level of Aincrad, a tall portal suddenly appeared on the teleportation square, which had been silent for a long time. Then two figures slowly walked out of the portal.

"Speaking of which, I've always been curious about a question." As soon as she returned to the first floor, Nia seemed to have thought of something and said to Zhao Si, who was beside her.

"What?" Zhao Si replied