Record of Ragnarok. Volume 5: Umemura, Fukui

Humanity's greatest heroes battle the gods for the survival of the human race!
Once every millennium, the gods assemble to decide if humanity is worthy of its continued existence or if it should be destroyed! When the verdict is destruction, the final battle between the gods and mortal heroes will decide the survival or extinction of the human race-a battle known as Ragnarok!
Humanity needs to get a win on the board as round three really gets going. Brunhilde's dark horse Sasaki Kojiro crosses blades with Poseidon in what is sure to be a legendary contest, and all of humanity's hopes now lie on the edge of Sasaki's blade. Whether Sasaki wins or loses, Ragnarok will continue! Then in round four, the gods decide to send in one of their best, the noble and honorable Heracles. But if the gods have chosen their greatest hero to fight for them, Brunhilde has selected humanity's worst villain to enter the arena…