Mori no Asagao.

New prison officer Naoki Oikawa is assigned to the death-row section. When he observes the death row inmate's fear of their impending executions (they can be carried out without forewarning), he thinks about the death penalty system. Naoki Oikawa then encounters new death row inmate Mitsuru Watase. Mitsuru Watase is on death-row for killing a man who attacked his parents. Naoki and Mitsuru were also on the same baseball team as children.