A Middle-Aged Salaryman at the Bottom of Society: Declared Terminally Ill, He Chooses to Die in an SSS-Class Dungeon… Only to Fuse with the Ultimate Legendary Monster and Become an Incredible Powerhouse!

In the depths of society, a middle-aged salaryman, worn down by the grind of life, faces the grim announcement of a terminal illness. Faced with despair, he chooses to enter an SSS-class dungeon, choosing death as an escape. However, an unexpected twist awaits him: he fuses with a legendary monster of unparalleled strength, transforming him into a formidable powerhouse beyond his wildest dreams!