Protoboros is a game of serpentine dogfighting. Bite the tail of your enemy.

Yao has no Yo-Yo. He's 0 Yo-Yo Yao. He schemes, and uses Ouroboros snake as decoy to get into a park. He waits to steal a Yo-Yo, but the snake is hurting. You're a brave young kid. USE YOUR YO-YO! DEFEND YOURSELF AND YOUR FRIENDS! SAVE THE SNAKE (BY WHACKING YAO & IT WITH YOUR YOYO)! Beware, he has an accomplice! If he reaches her, it will be the end of the Orouboros snake and your happy Yo-Yo days.