Princess Sissy was sad. She just couldn't forget the excitement of the Matrimelee tournament. The King, worried about the emotional state of his daughter (Who is usually joyful and vigorous) invited the world's strongest fighters to his country to convince them to enter to a new tournament, the "Bonnou Kaihou" tournament.
This time the prize is anything that the winner could wish for (Except the throne succession). When the King told Sissy about the Bonnou Kaihou tournament, her characteristic smile returned to her face, finally she will once again have that feeling that is present only in battle.