After advancing to a Second-level Mage, Green and his wife returned to the 'Summoning Cottage'. Using the contributions they amassed through the information, magic materials, and gold coins they provided to the academy after their graduation, Green was able to contract his first Lord-Level companion—
The 'Water Element Lord' from the Elemental Realm, greatly increasing his strength.
In the thirtieth year after graduation, Green returned with his wife to the Bilun Duchy, where Levia was from, and inherited Levia's father's commerce guild.
With the strength of Green and his wife, the originally small guild quickly expanded through maritime trade.
To commemorate his first contracted partner, the 'Bat Monster,' Green, after gaining the consent of his father-in-law and Levia, renamed the guild to the 'Black Bat Commerce', becoming quite renowned throughout Bilun Duchy and the surrounding seas.