Ultraman? No, It's the Dark Giant!

A purple ball of light, symbolizing hunting, and a red ball of light, symbolizing escape, tore through the night sky and fell towards the earth. An ordinary defense member named Akira Kurosawa was "selected" by the red ball during patrol and became the temporary symbiote of the dark giant "Anassius". At the same time, Purple Ball chose a girl "Misa Kobayashi" who was on her way home from school and imposed a cold will called "Site" on her. The fate of mankind was rewritten by the arrival of two uninvited guests. To protect or to destroy? The answer lies in the resonance of every heartbeat and the choice of every battle.