"You have almost died in one of the attacks of one of the strongest and dangerous devils in the world.. But it spared you as it made a contract with you." "You will have to obey its very commands, you've been under its care for almost 4 years now.. And there's a new commandment, you will have to kill the "chainsaw man".. But in order to do that you will have to befriend almost all of the " chainsaw man's" friends, and that Includes Aki."