After Handing in the System, I Became the Living King of Hell

During Chen Mo's sophomore year, there was an extra line of words in his field of vision. Target, location, countdown. Seventy-two hours. It's done, the lifespan is added back, plus a technology that shouldn't exist in this era. If you can't finish it, you will lose your life. He can't do it alone. So he handed it over. From that day on, he was no longer a student.