In a Watch Car Battle League match, Roy faces Kai. Roy initially uses a special attack called "Avon's Flame Attack." However, Kai's defense proves formidable, and Roy's hidden weapon explodes. Roy pleads with Mack to modify his watch car's gas fuel combination to gain an advantage.
Despite setbacks, Roy and his watch car, Blue Will, continue to battle fiercely against Kai. Kai activates a special move, "Power Coin Drive," and the match intensifies. In the end, Kai emerges as the unanimous winner, but Roy receives applause and support from fans.
After the match, Roy and Aria, who is revealed to be dating Hans, share a moment. However, suspicion arises when a wiretap is discovered in the ring Hans gave Aria. The wiretap reveals Hans had been eavesdropping on their conversations all along.
Aria is heartbroken by Hans's betrayal, and Roy confesses his feelings for her, though she is unsure of her own feelings. The story ends with uncertainty about the future of their relationship.
Here are the key facts extracted from the provided text:
1. Roy and Kai are participating in a watch car battle match.
2. Avon uses a special attack called "Avon's flame attack."
3. Avon's cannon explodes during the match.
4. There's a mention of a secret weapon that Roy wants to use.
5. Hans gives Aria a diamond ring.
6. It's revealed that Hans had been wiretapping their conversations.
7. Roy expresses his feelings for Aria, indicating he likes her.
Please note that these facts are based on the text provided and do not include opinions or subjective information.