Not long after joining the Rescue Aid Society, Benjiro became quite popular with the female representatives. As they find him very handsome and manly. Even Bianca appears to like him. Which has brought great worry to Bernard (her husband). He doesn't want to lose her to another man.

One day, Benjiro asked Bernard if he'd be interested in practicing sumo. Bernard didn't know how to feel at first. Benjiro explains to him that upon moving to America, he didn't have anyone to practice with. Not wanting his skills to dull, he was hoping to have someone to spar with. He saw potential in Bernard, so he asked him first.

Even though Bernard views Benjiro as a rival, he accepts the offer. Perhaps wrestling with him would be a healthy way of processing his feelings. As well as a good form of exercise. Though, he has absolutely no experience in this martial art form and isn't completely sure what to expect.

Benjiro teaches Bernard the basics of sumo, as well as a few exercises. Soon enough, they feel they're ready to spar for the first time. Both put on their mawashis and get into position. Bernard stares at his opponent, who is much larger than he is. The mouse is a bit nervous but determined. At the right moment, they charge at each other!