“Let’s be Treasure Hunters! We have only one goal: to become the strongest heroes in the world.”

Among the six people who have made that vow, only one young man is particularly untalented.

One day, as he expresses his frustration, his childhood friend says to him.
“Krai, you don’t have any role in particular, so why not become our leader?”

The “Grieving Soul” party, formed by the extremely talented monsters (childhood friends), has made a name for themselves throughout the Imperial capital within a few years, and Krai, being the top of a party, is promoted to the top of the strongest party.
Due to the high expectations of those around him, his words and actions are often misunderstood, and the situation takes an unexpected turn…

This is the heroic tale of Krai Andrey, filled with glory and pain, the leader of the strongest party, known as the strongest Clan Master!