Aki Hano

Mothra's twin nymphs and children from the city find a lost city, as well as a giant monster that is attracted to environmental calamities.

To save the world, Mothra goes back in time in an attempt to defeat a younger King Ghidorah.

Hajime, a postman, wakes up with amnesia after Valentine's Day. Reika has clues about his lost memories from that day. He tries to solve the mystery of his forgotten Valentine's Day events while their paths cross.