It's time for class 1-A to start getting ready for the end-of-the-year holidays. As excited as everyone is for Christmas, New Year's Eve, and the New Year itself, preparing means undertaking a big winter cleaning. The unsuspecting students get a big surprise when their cleaning leads to a crazy discovery. There's only one way to find out where the mysterious entrance they uncover leads to-and that means rustling up some Plus Ultra spirit and venturing inside!


現在是1-A班準備年底節日的時候了。雖然每個人都對聖誕節、跨年夜和新年感到興奮，但準備工作包括進行一次大規模的冬季大掃除。當這些毫無戒心的學生們開始打掃時，他們意外地發現了一個驚人的秘密。現在只有一種方法可以找出這個神秘入口通向何處——那就是鼓起超越極限的精神，勇敢地進去冒險！

（文字整理/羅美文）