Doppo Orochi sits down to watch the final match of his karate school's youth tournament. Atsushi Suedou, one of his disciples, faces off against Baki Hanma, a fresh teenage boy breezing through the matches. Intrigued by the boy's strength, Doppo, alongside another of his disciples—Kiyosumi Katou— visits the notorious Tokugawa underground ring—a hidden freestyle fighting arena that prohibits only weaponry in its matches. Upon arriving, they learn that Baki is set to face none other than Koushou Shinogi: an infamous karate master and user of the lethal Cord-Cutting technique.

Apfelland is a small but beautiful country surrounded by Russia, Austria, and Germany. Vel is a boy who lives in the capital, Charlottenburg. He happens to help a girl Frid. She was kidnapped because radium mine was found in her grandfather's abandoned mine. Aiming at the radium mine, various people gather there, for example, an American who wants to make money, a Polish woman disguised like a man who wants to earn money for the revolution, and the ministry of Apfelland who plots to affiliate with Germany. Vel and Frida are involved in their plots, and they know the secret of the mine.

A Shinigami named Baishin who was sealed by Soul Society long ago is set free on Earth. On a fateful day Ichigo encounters him and has roughly half of his reiatsu drained. Its now up to Ichigo and the Soul Society to finally put a stop to Baishin and his destruction.

After toiling away in his lab, the alchemist Jolly has finally succeeded in making a personality-swapping potion that is guaranteed to bring him entertainment. The boys of the Arcana Famiglia are tricked into taking the potion and find themselves in bodies that are not their own. With this successful experiment, Jolly has paved the way for a plethora of uncomfortable scenarios. However, despite the boys' desperate struggle to switch themselves back, there is something to be learned from spending the day in someone else's shoes.