King of the Back Room

In the third grade of junior high school, his grades were at the bottom. His teachers targeted him, his parents scolded him, his family was poor, and his classmates were isolated. The day before graduation, he chose to commit suicide by jumping off the building to end his life as a loser. However, he accidentally entered the back room, activated the system, and used the system to kill everyone in the back room. Others hide when they see the entity, but you chase the entity and beat it, and finally reach the peak of your life in the back room. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.