We Are the Wave

Several hundred years ago, humans were nearly exterminated by Titans. Titans are typically several stories tall, seem to have no intelligence, devour human beings and, worst of all, seem to do it for the pleasure rather than as a food source. A small percentage of humanity survived by walling themselves in a city protected by extremely high walls, even taller than the biggest Titans. Flash forward to the present and the city has not seen a Titan in over 100 years. Teenage boy Eren and his foster sister Mikasa witness something horrific as the city walls are destroyed by a Colossal Titan that appears out of thin air. As the smaller Titans flood the city, the two kids watch in horror as their mother is eaten alive. Eren vows that he will murder every single Titan and take revenge for all of mankind.

Choi Joon Woong seeks a job, but it's hard for him to get hired. One night, he witnesses a man trying to end his life and decides to stop him. He gets acquainted with grim reapers Koo Ryeon and Im Ryoong Gu, who belong to a crisis management team. Their purpose is to prevent people from committing suicide. After Joon Woong ends up in a coma and becomes half-human and half-spirit, he is employed by a company of grim reapers as the newest member of the crisis management team.