Why Does Nobody Remember Me in This World?

Kai's duty as a member of the Human Protection Agency is to ensure that the four races from The Great War are kept sealed in their graveyards; humanity has been at peace for 100 years, until one day a portal opens.

Kai discovers an unidentifiable girl in a demon graveyard; she pleads for help and he quickly agrees; after freeing her from chains, mysterious events unfold.

The resistance launches a major offensive against demons and their heroine following the demon attack on Neo Vishal; Kai and Rinne assist in the operation.

Kai and Rinne confront the demon heroine; a mysterious being reappears, attempting to remove Vanessa from the world; Vanessa fends off the attack and refocuses on Kai and Rinne.

Urza's resistance drives demons from the capital and sets out for the Federation of Io; the Io resistance requests support against divine beings, but it becomes clear that not everyone welcomes this aid.

Jeanne and Urza's resistance encounter remnants of the Io resistance in the Elfan Forest; following the trail, they arrive at the Elf Village, where the leader of the elves awaits with a proposal.