A boy, Tsuwabaki Daiya found a black fire in an ocean when he and his father were in a small boat. A big monster came out of the fire, and the father and the crews were disappeared into the sea. When he was about to become the next victim, a large mecka dragon appeared and saved him. 5 years later since then, Daiya becomes a junior high school student. A big monster reappear, and he meets the mecha dragon,Daiku Maryu. The head of the dragon separates from the body, and it turns into the body of a super robot, Gaiking. He gets in Gaiking, fights against the monster, and beats it. He learns that there is an enemy that plots to conquer the world, and he leaves for another world, Darius, to stop the plot. (Source: AnimeNfo)

Mayoi Neko Overrun! Extra.

The second part of Nanatsu no Taizai: Ensa no Edinburgh.

There is a world in which an endless rain of dark ash fills the sky, and covers the earth. Humanity, fearing the ash that burns and melts away human flesh, had no choice but to cover themselves in protective suits, and their faces with gigantic masks. Bundled up in their suits and hidden away behind their masks, the people have fled deep within the underground. This is the story of the children growing up in this fearful world. (Source: Official site)