Catarina finally meets Maria Campbell, the heroine of the otome game, and redoubles her efforts to avoid triggering her destruction flags. Maria's charming appeal leads Catarina to mistakenly believe that she's already conquered Geordo and Keith, so she calls for another of her now-habitual "mental meetings" to work out a strategy.

With summer vacation over, Catarina and the others are gearing up for a practical exam. The condition to pass is to retrieve a stone inhabited by magical power from the depths of some ancient ruins. Catarina teams up with Geordo, Keith, and Sophia to enter this complex dungeon filled with traps.