The Sword of Princess Gluttony

After Dean, a third rate adventurer, got surrounded

by demonic beasts in the demonic labyrinth

he fled to a place where he found the strongest demon who devours power

The demon-fed sword Belzera, born to the Gluttony Empress Belzebuth.
After obtaining such unexpected power, he once again aims

to become a first-rate adventurer like he looked up to

and delves deeper into the labyrinth. However…