Eren is a student in high school. He is quite popular in school. One day, as usual, he forgot to bring his lunch when he went to school. As he sat on his chair chatting with some of his friends,with teacher who provide teaching materials, the classroom door opened. They thought it was another teacher coming in but it was a small figure in the doorway. It was Eren's little brother, walking into the classroom with small steps while carrying a box of lunch in his hand