Iberis is an S-Class Esper who received a diagnosis for a terminal illness. Having lose family, colleagues, and loved ones, he had no regrets in life. If he had one wish, it would be to die with a little less pain. However, S-class guide Lucas suddenly intrudes on Iberis's life, making Iberis second doubt what he really wants. Iberis, the esper with no will to live, and Lucas, the guide who struggles to save him. What kind of ending awaits the two people walking on a tightrope between life and death?