Chapter 1

The Boy's Vow「少年の誓い Shōnen no Chikai」is the 1st Page of Yūki Tabata's Black Clover.

Asta and Yuno are orphans from Hage, a village in a country side of the Kingdom. The moment both of them received their grimoires, the race is started on who will become the next Wizard King. Who will it be? Yuno with his four-leaf clover grimoire which is the same as the one received by the first King or Asta with his five-leaf clover grimoire where the Devil resides.

Summary
It has been quite a long time ago when a certain mage defeated the demon that was attacking humankind. That mage was, later on, known as the Wizard King. Many generations later, the Wizard King becomes a title bestowed to a mage elected by the people with a duty to protect the Kingdom from any harm.

Asta is a young orphan boy living in a church with a dream to become the next Wizard King. Unfortunately, many people around him doubted that it would come true because Asta has a lack of magic power. Subsequently, he is being compared to Yuno whom possesses an extraordinary amount of magic power and the talent to manipulate it. Determined to prove his worth, Asta left to train his body to compensate his lack of magical talent.

Later on, around the time when the firefly dandelion fluffs float around, a ceremony that awarded all youngsters of 15-years old with Grimoire is held. The ceremony awarded nothing to Asta while Yuno received a grimoire that has a four-leaf clover at the cover in which was the same grimoire that the first Wizard King received at his ceremony. At that moment, Yuno declared that he will become the next Wizard King while rejecting Asta's declaration of rivalry.

In the evening, as Asta is still left shaken from the ceremony, Yuno is confronted by Revchi. He revealed that he is a former member of the Magic Knights turned thief while taking possession of Yuno's grimoire. Asta came to his friend's aide but unable to hold the ground against Revchi whom is armed with a grimoire. As Revchi is trying to bring down Asta's morale, Yuno revealed that his friend is also his rival that gave him courage since Asta saved him from a thug. After hearing Yuno's true feelings, Asta regained his determination and, at the same time, a grimoire came to him. Using the tattered grimoire, Asta summoned a claymore covered in dirt and defeated Revchi. At the end, Yuno accepted Asta's declaration of rivalry while remembering the promise that they made in the past about becoming the Wizard King.

Magic used

 * Embodiment Magic
 * Holy Fist of Love
 * Magic Binding: Iron Chain Formation
 * Dance of the Pitless Viper
 * Wind Magic