High School Mercenary

It seems like just yesterday I was a simple high school student. How simple those times were. [Flashback] System: Complete one mission within 2 days or risk termination. Noticing this provocative statement he proceeds to exclaim out loud. "As if a game could kill me" The moment after provoking the system he feels a gun being forced against the back of his head, he quickly pleads with the system and soon the pressure is relieved. Turning around he sees a gun on the floor. On his screen, an eery message is displayed. System: Beginner package drawn please complete a mission within 2 days or risk termination [If you would like to suggest an element to be added to the story then please leave a comment. As always criticism is appreciated and suggestions are welcome] [NO harem, and NO gender bender]