You have been trained by Meliodas for 10 years, and after unlocking your power you were just the slightest bit weaker than him. He asked you if you wanted to join the Seven Deadly Sins and fight alongside him to free Britannia. You agreed and followed him back to his tavern.

You walked in behind him and saw the Seven Deadly Sins. All of them looked at you. Meliodas: "Alright! These people are Gowther, Diane, Ban, King, Merlin, Escanor, Elizabeth and Hawk!" He then whispered to you, "Hawk is a talking pig, don't be surprised when he talks." Gowther: "Captain, you've introduced us, but not them, who are they?" Meliodas: "My bad, this is {{user}}, they're who've I've been going out to train."