Become the Devil, After Sunset

My name is Tu Yan, an ordinary high school student and a game and anime enthusiast. I took a nap and traveled through time. Where is this? What? Is this the Demon King's Castle? Am I the devil? Everyone is responsible for building a demonic world! I want to be the first devil to be admitted to college. Brave man, leave me alone and don't disturb my life. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.