“Yes. The tower consists of a total of one hundred floors. Challengers must make their way through the building, starting on the first floor. By defeating the master of each floor, you can obtain the key that will lead you to the next one.”

“And I have to get to the top, right?” He was already dreading just how tedious this challenge would be. No matter how you looked at it, a hundred floors was too much.

“Yes. If you can make it to the roof, you will have earned the right to challenge Lord Raiza.”

-Volume 5 page 163

「はい。 タワー は 全 百 フロア から なっ て い まし て、 挑戦 者 の 方 には 一階 から 挑戦 し て いただき ます。 その フロア に いる フロア マスター を 倒し て 鍵 を 入手 すれ ば、 次 の フロア に 進む こと が できる の です」「…… それ、 やっぱり 最上階 を 目指せ って やつ だ よね？」 　 夜霧 は うんざり と し て き た。 百 階 は いくら なん でも 多 すぎ だ。 「はい。 屋上 まで 到達 できれ ば、 ライザ 様 への 挑戦 権 を 得る こと が でき ます」

-Volume 5 pages 211 and 212

The final Floor Master offered no resistance, promptly handing over the key. Yogiri took it and opened the door, which led to a staircase that took them up to the roof.

“That was just as annoying as I thought it would be.”

“We managed to make it through rather smoothly, though. Too bad we had to kill almost everyone to get here.”

-Volume 5 pages 164 and 165