Ei Makihara

"Those drugs cost about 450 thousand yen a month. In other words, I need about 5 million for my sister to survive a year... 50 million for ten years... 100 million for twenty... Should I keep killing evil people in order for my sister to live?"

- Yukitaka Shiki

"You should kill them. Sensei, you saved me, you didn't do anything wrong. You're an ally of justice!"

- Itsuki, in response

"I hit him with the intent to kill... and then he really died.... He's dead, I've killed a man..."

- Ei Makihara contemplating his actions after killing Maeda

Ei Makihara was a young man working for a Yakuza-affiliated con-man named Ichiro Shibuya, who was involved in scamming numerous people out of their life's savings, driving some of them to suicide. This made them to target of the vigilante organization Yukitaki Shiki and Detective Kuzumi worked for, who sent them to assassinate Shibuya and make it look like an robbery gone wrong. Kuzumi and Shiki entered the building where Shibuya based his operation and stabbed him to death. As they did so, however, they were caught in the act by Bizen, another employee of Shibuya's who drew a Beretta and tried to shoot them. However, in the close quarters, Shiki and Kuzumi managed to disarm and stab him to death.

Ei later arrives on the scene and discovers Bizen, a close friend of his, dead. Ei takes Bizen's gun and hunts down the perpetrators, eventually encountering Shiki and Kuzumi shortly after killing a serial killer. Like Bizen, Kuzumi and Shiki catch him by surprise and disarm Makihara, but do not kill him. Instead Shiki imprisons him in his apartment for a period of time, until a Yakuza hitman, Maeda, enters the apartment while Shiki is away on a school trip and rescues him. Then, Maeda attempts to rape Itsuki, a girl living with Shiki. This infuriates Makihara, who had become friendly with Itsuki during his captivity, and a clubs Maeda to death with a frying pan.

Kuzumi discovers the scene and tells Makihara that he is best off siding with them, as the Yakuza would kill him as soon as they found he killed Maeda. Makihara reluctantly agrees, and becomes involved in their vigilante assassination scheme.