Sato Hane was originally an ordinary teenager who was sentenced to life imprisonment and imprisoned in Karl Prison for killing all his classmates and teachers in a military academy. In prison, he experienced various cruel challenges and battles, and gradually showed strong strength and leadership skills. In an accident, he was possessed by the God of War system and obtained the ability of "God of War Three Minutes (Pseudo)", which allowed him to go back three minutes in the past and change the outcome of the battle. After being released from prison, Sato Hane came to Beidou Military Academy to study, where he encountered various challenges and opportunities. He made some friends and enemies in the academy, and at the same time continued to improve his mech driving ability. In the game "Mech Empire", he won every battle under the online name of "The Second in the World", which attracted widespread attention. During his study and life in the academy, Sato Hane also encountered some mysterious events and characters. For example, the appearance of the cult saintess Kurosawa Natsu, and the contact with the president of the Medical Research Institute of Beidou Military Academy, Mrs. Baian, made his experience more colorful. At the same time, Sato Hane also accepted Oda Oku and Sasaki Rokuro as his younger brothers, but Sasaki Rokuro was punished to death by the God of War system for betrayal, and Oda Oku was filled with fear of Sato Hane after experiencing a series of events.