One day, Takuma saves Natsuki and receives a revelation from Odin, the lord of Asgard, that the world will end soon and that it is on Takuma's shoulders to save the world. To help him with his mission, Odin sends his nine daughters, the nine Valkyries, down to Midgard/Earth. Odin then gives him his mission: he is to prove that love will save the world as it is said that the source of a maiden's strength is love.