F-Rank Summoner: My Pet Summoned Beast Grew into Bahamut, So I Quit Adventuring to Become the Strongest Dragon Knight

From the weakest summoner to the world's greatest dragon knight! The adventurer Jay was mocked by those around him as the "Lizard Summoner." Although he was a professional summoner, the only summon beast he could call forth was a small lizard, which led him to be despised. As a result, Jay couldn't form a party with anyone and continued his adventure alone, cherishing his little lizard, Kucck... But one day, suddenly Kucck grew into a huge and magnificent dragon – Bahamut! Seizing this opportunity, Jay began working as a carrier. Before long, rumors of the "Carrier Dragon Knight" spread throughout the royal capital, and everyone started to rely on him!