Every Death Gives Me a New SSS-Rank Power. So I Started Dying on Purpose.

What the story is about

After receiving a diary from his future self, high schooler Su Mu learns that the Human Race is destined for extinction and that he must grow strong enough to change its fate. His unusual talent lets him copy the abilities of those who kill him, while a twelve-hour rollback and a powerful knowledge system help him survive a brutal martial world and uncover threats from within.