Impatience

"You should have done this sooner…" Seara said when she took out her glasses. "Still, there is a certain charm in these glasses."

"This isn't a very good idea… I just realized this, but the more the light is around, the more this technique consumes my mana," Rain said while rubbing his chin thoughtfully. 

"Isn't this technique that you use to disappear all of a sudden?" Seara asked. "The enemies probably won't find us."

The objective of that technique wasn't that, and it was to make Rain feel like Batman, to disappear from everyone's sight when they looked away for a single moment. In any case, it looked like the technique was truly going to help them with that because when they began to move, the monsters on that floor began to appear.