[Location: True Skill Emporium Main Office!]
Adrian/Crow left the place after buying the three B-Grade Skill Cards with him. Though he couldn't sign any form of contract with the shop owner, he was still guided through various processes of exchanges. As long as he provided enough cards, the shop would always be open for him to sell any high Grade Cards he wanted to sell.
There were two reasons why he didn't sign any contract. First was that the contract bound him to provide them with at least 10 B-Grade Skill Cards, 2 A-Grade Skill Cards or 1 S-Grade Skill Card. The second was that he needed to provide information about his power levels and such so that they may assign an equal level of benefit to him, for example giving him free skill cards and items that would be helpful in his journey.