The Summary of Attack on Titan

　Attack on Titan is a comic that was written by Hajime Isayama in 2009-2021.
This story is not only about fighting with a titan, it has a magnificent story.

　There are so many characters in this comic like the real world. For example, what kind of human race people are and what religion people have. But the main characters are three people, Eren, Mikasa and Armin in Paradis Island.

　In this book, we, people have to fight and kill titans in order to get freedom. So the three main characters become The Scout Regiment whose job is to defeat them as an army.
And Eren accidentally becomes a titan accidentally, then he grows into a good military strength of people.

　 One day, Scout Regiments found out the truth of titan. The truth was that every titans' true nature was human kind. They felt so depressed because they realized that they killed humans for a long time.
　 Another truth was that Eren had been a core of the titans.  When he touched the woman who was the blood of a royal family, he got to know everything about the world and he was reminded of what he wanted. The want was to destroy humanity. In other words, he was the biggest threat for people.

  Finally, Eren was killed by Mikasa. This scene was so sad, because she loved him so much but this was her obligation. And then, they could find out the real hope of Eren. The hope was that he would make his friends, Mikasa and Armin, become the hero of people, because of killing Eren and eradication of titan. He thought this would lead to stop fighting in the differences of the human race. He said to Armin "This was the only way to save everyone on Paradis Island. '' in the final chapter.    
  So, readers considered Eren to be so bad and selfish before reading last, but when we read the entire story, we knew him to be a thoughtful person though selfish.

Reference:
Isayama, H.(2009-2021).進撃の巨人 [Attack on Titan]. Japan: Kodansha.