Chapter Extra: Zero

"Chapter Extra: Zero is an extra chapter of the Tokyo卍Revengers manga series, written and illustrated by Ken Wakui. It was included in the second volume before Chapter 13.

Summary
Draken recounts his early youth, specifically his 5th year in elementary school. Because of his impressive fighting prowess and stature, he is feared and respected by his peers. Dubbing himself "Draken", he gets his signature dragon tattoo on his temple in honor of this, which soon becomes a warning to other children, including middle schoolers, of his notorious fighting skills and strength.

Sameyama, the leader of the local gang, the Sameyama Sect, orders Draken to refrain from fighting middle schoolers. He obeys, as the group has successfully beaten him up before. Additionally, they order him to bring a Year 5 student named Mikey, who is from a neighboring elementary school, and is notorious for beating up a biker gang leader.

Impressed by the stories of Mikey, Draken wants the opportunity to try fighting Mikey before he is brought to Sameyama. However, upon seeing him, Draken is underwhelmed because of Mikey's average stature and aloof personality. As he brings Mikey to Sameyama, he worries Mikey will be beaten up, or even killed.

Before Draken can finish introducing Mikey to Sameyama's group, Mikey kicks Sameyama in the face, caving it in. Draken is awestruck by his fighting ability. Mikey compliments him and asks to be friends.