OVA bundled with the 34th volume of the manga.
 
It contains the following stories: 
1. A Fight!! The Captain Knight of Food Scraps 
2. Naked Heart 
3. Harlequin and Helbram 
4. The Sins Vacation

Melodias, Hawk, and Elizabeth retook the Kingdom of Leones from the Holy Knights. The festival went off without a hitch and the crew enjoyed their well-earned peace. And yet, another threat looms on the horizon. The Ten Commandments, a group of elite demon clan warriors, have their sights set on the kingdom.
 
(Source: Anime News Network)

When they were accused of trying to overthrow the monarchy, the feared warriors the Seven Deadly Sins were sent into exile. Princess Elizabeth discovers the truth the Sins were framed by the king's guard, the Holy Knights too late to prevent them from assassinating her father and seizing the throne! Now the princess is on the run, seeking the Sins to help her reclaim the kingdom. But the first Sin she meets, Meliodas, is a little innkeeper with a talking pig. He doesn't even have a real sword! Have the legends of the Sins' strength been exaggerated...?
 
(Source: Kodansha USA)
 
Note: Chapter count includes 346 regular chapters, 18 extra chapters, and 3 gaiden chapters.

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