Originally streamed on the official Youtube and NicoNico channels and later included on BD/DVD Vol.5.

Muco is the sweetest, most lovable dog in the neighborhood. This sparkly-nosed Shiba Inu lives with her owner and best friend, Komatsu, a glassblower who lives in the mountains. These two companions have wonderful adventures, from going on walks to playing in the pond in front of their house. No matter where they go or what they do, Muco will always love her best friend Komatsu! [Written by MAL Rewrite]

Eris is the goddess of chaos and uses the body of Elien, who is a friend of Hyoga, to revive herself. She obtains the golden apple to drain Athena's life energy to make her ressurection complete and to be able to turn the world in a place filled with chaos. But to be able to attack Eris, Seiya and his friends will first have to defeat the Ghost Knights.

After Gravion was able to use its ultimate attack, the Zeravire threat seemed to have temporary stopped. However when it rises back up all of a sudden, the Earth Gult and its trump card, the super robot Gravion, is needed to defend this world again. All this while, the EFA is planning to create their own weapons to counter the Zeravire, the Grand Trooper. Now as they attempt to fend off the Zeravire, the people of the Earth Gult and EFA must protect their future as well as confront their pasts, and unveil the mysteries of the Zeravire.