Prediction time:
Scenario 1: Masaru and Heima build up his puppet to compete, puppet gets sabotaged right before the competition starts/Heima gets injured, Masaru jumps in with his puppets/Heima's puppet and wins competition.
Scenario 2: Both Masaru and Heima enter the competition in order to increase their odds at winning. Fight each other in the final round.
Scenario 3: Masaru and Heima build up his puppet to compete, Heima competes and wins
Scenario 4: Regardless of 1-3, Yuri somehow enters the competition herself and wins so no one gets to mock-marry her.
I'm hoping for scenario 1 but 4 would be funny.