Rentarô Aijô decides to date all of his soulmates after Hakari Hanazono and Karane Inda confess to him at the same time God of Love tells him that they will die if any of his soulmates fails to get into a relationship with him.

Cid Kagenou creates an elaborate plot to fight the Cult of Diabolos and builds his organization, the Shadow Garden.

Follows Yuta who repeatedly drew and then erased Gridman in his notebook, which he vaguely remembers. Then he decided to confess his feelings to Rikka, and their life in such a peaceful world begins to crumble with a roar.