Broken Calamity

[CURRENTLY PART OF THE WPC #234. PLEASE SUPPORT WITH POWERSTONE] Zac reincarnates back to the beginning of the Calamity, with his memories of the future, will he be able to live a life without regrets or will he be forced to watch again the desperate struggle of humanity against the foreign races? Read and find out. Note: The cover's not mine, it will be removed if the owner does not approve of its use.