Boushoku-Hi no Ken

Dean, an average adventurer, escapes a deadly encounter with demonic beasts in a labyrinth by fleeing to a location where he discovers a powerful weapon—Belzera, a sword created by the Gluttony Empress Belzebuth. This weapon consumes power and is described as the strongest demon. With this newfound strength, Dean seeks to rise from his current status and become the top adventurer he admires. He returns to the labyrinth, determined to advance further. However, challenges lie ahead.