In the 21st century's final chapter, humankind's technological strides led to the creation of a mammoth energy source. Alas, the innovation proved catastrophic, surpassing the destructive power of nuclear weapons. Nearly all civilization crumbled, with survivors residing in dread of rampant lawlessness.
Hailing from a clandestine lineage of protectors, Hagakure Kakugo's family safeguarded humanity from nefarious factions and threats for generations. Only summoned in times of peril, Kakugo remained comatose for decades. He underwent intensive metal fusion modifications to bolster both his defense and offense. Equipped with the Exoskull armor, he amplified his already formidable powers. Thus began a tale of a young man and his armor, venturing through hellish landscapes.