Earth Defender Valkyrie Kagura ~Their body used as a seedbed for breeding~

The earth were invaded by an unknown extraterrestrial being now known as "Alter". - Nobody knows what their purpose is, but one thing for sure, they are the enemy of humanity. - A special force called the "Valkyries" were formed to counter them and reclaim back the lands once owned by the humanity. - Will humanity prevail? or will they extinct in the hands of the Alters?​