She Only Wants to Complete the System's Tasks

Given a new System mission, I must use soul swapping to save the school. Before long, a classmate snapped and started hacking at people with a knife. A chubby person gave up their life so the others could escape. But they were one of the people I had to protect. I had no choice but to jump from the second floor to protect her. I took every blow meant for her. Luckily, she wasn't hurt. “Go on, get out of here. I won't die.” After getting her safely to a secure place, I hid in a corner and used the medicine the System gave me to treat my wounds. Then I continued using my own blood to seal the demon, growing weaker and weaker until I fell into an endless sleep. “Xiao Yun, hang in there.” He sent his own blood into my body. “Xu Fengxiao, what are you doing?” “Nothing. I just won't let you die.” “Fool.” This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.