In the year 2121, the world has been stripped of all sweetness. King Ozuku has enacted a strict Sweets Prohibition, making it illegal for anyone to enjoy candy or desserts. In this bland and joyless era, a young boy named Kaneki Chocolate rises as the one hope to reclaim what was lost. Armed with the power to transform into various confections, he fights to restore sweets to the people in a battle known as the Kashi Battle.

The story follows Kaneki as he battles against the forces of the Ozuku regime, utilizing abilities derived from different types of snacks such as chocolate, gum, and popcorn. His motivation is straightforward yet powerful: to break the kings decree and bring the simple pleasure of candy back to a world that has forgotten its taste. The conflict escalates beyond individual fights, eventually developing into intense group exchange battles where teams of fighters clash over the fate of confectionery.

Kaneki is the determined protagonist fighting for freedom and flavor. King Ozuku serves as the primary antagonist, the ruler who implemented the Sweets Prohibition and stands as the greatest obstacle to Kanekis quest. As the series progresses, significant attention is given to a character named Lemonade, with a notable narrative arc in the fifth volume that delves deeply into this character's secrets and backstory. The setting is a futuristic dystopian version of the world, where the absence of sugar has created a society in need of liberation, making every battle a fight for happiness itself.