Yu Yu hakusho is about some kid who dies saving a child when this little kid kicks a ball in the road and Yusuke pushes the kid out of the way and gets hit by a truck...and the people in spirit world did not expect him to do this and gave him a second chance since Kayko cared so much about him...then he came back as a spirit detectiv....he investigated abnormal things and busted criminals...Hiei and Kurama started out as criminals...and Yusuke helped Kurama save his life by wanting to sacrafice his own life to save Kurama's mom's life...and he had to fight Hiei to get him...then later he goes to see Genkai who held a mini tournament and he was there with Kuabara his junior high friend....he went to see Genkai because he was looking for a demon named Rando and Kuabara was in the tournament to learn how to control his high spirit awareness power...so they passed tests and trials and in the end Yusuke killed Rando and saved Kuababr and had to stay with genkai to train as the prize for winning the tournament...and I'll say more later....