Yu Yu Hakusho OVA | | At the end, he entrusted Mudan to go to the human world to find Yusuke, but Mudan was exhausted and seriously injured after arriving in the human world. From the mouth of Bai Shi, the guide in the spiritual world, I learned that all of this started from the underworld. Thousands of years ago, the underworld intended to extend its claws to the human world, and a fierce war broke out with the Lord of the Spirit World, King Yama. The people in the underworld were finally defeated and were sealed at the end of the universe. Now that the night demon in charge of the underworld has returned with his disciples, the human world is facing a huge crisis. At this critical moment of life and death, Yusuke, Kuwahara, Kurama, Hiei and others must find the aura gates representing earth, wind, fire, water, and spirits to transport energy to the spirit world, while the Night Demon steals the energy to the underworld. A battle between good and evil begins...