Mukashi Tasuketa Saijaku Slime ga Saikyou Slime ni Natte Ore ni Natsuku Ken

“I never want to lose someone important again…”

Bullied and ostracized, I was just a loner—until a reckless dare sent me into an SS-rank dungeon.
Hopeless. Helpless. Facing a Black Dragon far beyond my power, my end seemed inevitable…

Then it appeared.
A little slime I had once saved—
Now evolved into something terrifyingly powerful.

This is the story of how the weakest boy and the once-weakest slime form a bond that will change their fates—
A tale of growth, loyalty, and the unstoppable rise of an unlikely duo.