The Seven Deadly Sins of Pirates

On the ship of Roger, the Pirate King who advocates pure force, there happened to be seven maverick crew members. They developed the ability of Devil Fruit to the extreme, but they disappeared after Roger surrendered. It wasn't until the child who inherited the bloodline of sin was born that the seven weirdos named after sin reunited... (The character design refers to the seven deadly sins, please feel free to complain. Book club group: 438032930, interested friends can add it. If you join now, you will be the elder.)