Etna's Embarrassing Secret

Laharl, Flonne, and Etna arrive at the castle of Maderas, the demon who placed the bounty on Laharl's head. However, after he reveals that Etna is the one who poisoned him and tried to kill him, Laharl and Flonne become trapped in a board game full of embarrassing traps. When Maderas goes back on his promise to restore Etna's memories, Etna becomes to determined to find them for herself, but what about Laharl and Flonne?