After an altercation that ruined his life, Kai Astraea transferred to Kaminari High where he was looking froward to hide underneath the radar and blissfully avoid any trouble. But his appearance which represented the sign of Aries ruined that image.
After meeting Daigo Mikoshi, the representative of the Snake, Kai realised that he can recreate Zodiac basketball, a sport played with the members of the Chinese and Western Zodiac. Zodiac Basketball was distorted as the Zodiac signs couldn't work together.