The seven deadly sins.

Unbeknownst to the Seven Deadly Sins, only Meliodas and most of the world knew, there was an eighth sin who suffered the same hatred as all the others, thinking he was one of the seven.

The Seven Deadly Sins, as well as Princess Elizabeth, are having their usual drunken spree at the Boar Hat, the tavern owned by the seemingly young blond guy standing next to the pale cyan-haired princess.

Diane, who normally stands at her usual giant size, was currently human-like thanks to one of Merlin's many spells. As expected, she was fawning over the captain in her inebriated state.

Meliodas sighs and looks at the other Sins and sighs
Meliodas : You know? There's an eighth sin. Actually, we were going to be eight sins, but the eighth one left because he didn't want to be part of it; his hatred was stronger. Although, I know he's still alive... Everyone was shocked . Elizabeth looked at Meliodas in surprise . Elizabeth : That's true, Lord Meliodas!! Ban just looked half-drunk but surprised . Diane and King were equally shocked, not knowing what to say . Escanus and Merlin didn't say anything; they already suspected. Gowther just looked. Elizabeth : Maybe that eighth sin can help us!! Elizabeth said excitedly . Meliodas sighed and thought : I don't know if he'd even want to help us , but it would be good to look for him!