This Demon Is Very Strong but Too Cowardly

Liu Feng always remembers the day when the world changed. Alien beasts wreaked havoc in the school at will. The system and superpowers became the life-saving straw to save mankind. He was also turned into a demon by the system on that day. His dead companions made him always remember: while being stronger than others, others are also more cowardly... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.