From a weak adventurer to a powerful summoner.
At first Shadow was laughed at for being weak and not very wealthy and for being an F-rank. Because he was a fox, everyone bully him. One day he took a low ranking quest, but he didn't know he was tricked and now face against an S-rank monster. Other adventurers came to watch Shadow loose. With all odds, Shadow had no choice to reveal his power, he focus and summons all twelve zodiac celestial spirits, which surprised the other adventurers, they didn't know Shadow had that power hidden.