Having saved the kingdom of Liones from the Holy Knights, Elizabeth and the Seven Deadly Sins enjoy some well-earned downtime before heading off to their next adventure. Ban and Meliodas have a bout, settling an unresolved score and attracting a large crowd in the process. King and Diane enjoy a date together, Merlin tries waitressing at the Boar Hat while Gowther makes a new friend in town, and Hawk sends everyone on a wild pig chase! All the while, their defeated enemies are slowly recovering their strength, promising to make a lot more trouble for everyone in the not-so-distant future... Source: Anime-planet.com

4 little side stories with a little build-up to the upcoming season. Consider them fillers where they just take a bit more time to dive deeper into the cast and their relationships. To be fair, the most interesting part actually happens after the credits.