After Returning from the Army, I Worked as a Bodyguard for the Eldest Lady in School.

Yu Jin, a freshman in college, enlisted in the army and was selected into the special operations team due to his outstanding skills. Due to the failure of the mission and the tragic death of his comrades, he was disheartened and suffered psychological trauma. After being discharged from the army, he returned to school. Under the arrangement of his old leader, he assumed the task of protecting the eldest daughter of the Su Group. As the incident developed, the truth behind the murder of his comrades gradually emerged.