Zion, a solo adventurer, recklessly entered a dungeon beyond his ability.<br> Alas, that was the last thing he did. Wandering inside a dungeon for hundreds of years, as an undead, he kept advancing into the dungeon. Slaying monster left and right until his undead body underwent ‘evolution’ many times over――<br> ―― By the time he regained his ego, he had already become the strongest undead: 【No Life King】. The humankind, who was made aware of the appearance of a new world-class disaster monster, felt dread as they fell into the abyss of despair. 「The world is… done for」… Or so they think.<br> 「It’s okay, do I look like an evil undead to you?（Smile~）」<br> 「「「HIIIIIIIIIIIII！？」」」<br> 「… SOMEONE PLEASE TELL ME WHYYYYYYYYYYYYYYYYY!?」<br> This was the tale of the humans who trembled in fear [out of their own convenience] and him, an undead, who actually had no intention to destroy the world.