My favorite anime -World Trigger-

My favorite anime is World Trigger. The original of this anime is comic. It is written by Daisuke Ashihara. It is an action comic.

The set of this anime is Mikado city in Japan. This place is fictitious. Mikado city was attacked by extraterrestrial life four years ago. They are called Neighbors. They came from different world. They come over to the earth through a hole named Gate. Certain people appeared to save citizens there that time. They belonged to organization named Border. Border is an organization to fight against Neighbors.

Two heroes appears in this story.
The first hero is Osamu Mikumo. He is fifteen years old and a junior high school student. He belongs to Border, but he is a trainee at that time.
Osamu meets a mysterious boy. The boy is the second hero. His name is Yuma Kuga. He has white hair. He is not a human. He is Neighbors. He visits the earth because he obeyed a will of his father named Yugo Kuga. Yuma wants to meet Yugo's friend. Yugo said that the friend named Souichi Mogami belongs to Border.

One day, a transfer student comes in Osamu's class. It is Yuma. After, they make friends through a case about Neighbors. Osamu knew that Yuma is Neighbors that time.

After that, Yuma meets a girl and a man. The girl is Chika Amatori. She is Osamu's childhood friend. The man is Yuichi Jin. He is called Jin. He is a S grade combatant at that time.

Border's combatants were divided into four groups. It is S grade, A grade, B grade and C grade. C grade is trainee.
Border's combatants use Trigger. Trigger is the only weapon to fight Neighbors. Two Triggers appears in this story. It is normal Trigger and Black Trigger.
Trigger is formed Trion. Trion is vital energy. Human have a Trion organ, but it can not see. Trion organ secretes Trion. There are individual difference.
But Black Trigger is different. A great user of Trigger can make Black Trigger. It is made with all Trion of a user and the user's life. Black Trigger's performance is highly than normal Trigger. A combatant who use Black Trigger is S grade.

There are three factions in Border. Border's members belong to which factions. It is the Kido faction, the Shinoda faction and the Tamakoma branch.
Kido is commander. He is a member of a foundation group of Border. He hates Neighbors. The Kido faction aim to be completely destroyed. It attach importance to expedition to Neighborhood. Neighborhood is the place that Neighbors lives. Kido is Yugo's friend.
Shinoda is a manager of main office. He does not feel any will toward Neighbors. The Shinoda faction attach importance to depend Mikado city against enemies.
The Tamakoma branch's members are few. The manager of the branch is Takumi Rindou. Jin belongs to the branch too. They are friendly for Neighbors without their hostility.

Yuma's Trigger is Black Trigger. It was made by his father, Yugo. So Yuma is aimed by teams of the Kido faction. Kido decides to rob Yuma of his Black Trigger. Jin recommend that Yuma joins Border and belongs to the Tamakoma branch because Jin wants to protect him.

At first, Yuma refuses to join, but he decides to join Border with Chika. Chika decide to join because she wants to rescue her elder brother. Her brother was swept away by Neighbors. Yuma decides to help her with Osamu.

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