To prepare for the upcoming battle against the devil, the Black Bull Grey decided that she needed to get over her shyness and be able to face her friends first before anything else, so she asked Noelle to mentor her. However, things aren’t going very well. Next, Grey tries to get Gauche to help her, since they had fought together in the past. For this training, she walked around town with him when it was crowded, but then they saw a panicked Charlotte run by.

Asta and Yuno were abandoned together at the same church and have been inseparable since. As children, they promised that they would compete against each other to see who would become the next Emperor Magus. However, as they grew up, some differences between them became plain. Yuno was a genius with magic, with amazing power and control, while Asta could not use magic at all, and tried to make up for his lack by training physically. When they received their Grimoires at age 15, Yuno got a spectacular book with a four-leaf clover (most people receive a three-leaf-clover), while Asta received nothing at all. However, when Yuno was threatened, the truth about Asta’s power was revealed, he received a five-leaf clover Grimoire, a “black clover”! Now the two friends are heading out in the world, both seeking the same goal!

The Spade Kingdom successfully takes over the Diamond Kingdom and then sets their sights on the Clover Kingdom and Heart Kingdom. The Spade Kingdom troops get through the strong magic region using a mobile fortress which sucks up the mana of the Spade Kingdom citizens who were taken by force. But then Asta, who had finished his training with the Spirit Guardians, comes to the rescue! Meanwhile, Luck and Leopold head to the Spade Kingdom in order to try to take over one of their bases.

The War against the Spade Kingdom begins in earnest as the Heart Kingdom and Black Bulls come under attack by Dante and Vanica of the Dark Triad.

As the situation in the Heart Kingdom deteriorates beyond belief, Captain Yami Sukehiro pushes past his limits.