The Espers are humans with special abilities. They can, when a person is suffering, share the pain and see the past and the memories of that person. Using their powers and their understanding of the problem, the Espers can help the person, and give them the will to live again.
Ryo tells what happened when he passed his exam to become a certified Esper and how these events impacted his life and the life of many others to the point that they changed him forever.