| This article needs more information and resources!
Please, help in expanding it, fellow Diary User!
Story plot Edit
Yoi is the son of Keigo Kurusu, and is in the hospital due to a heart condition. In the third world Minene Uryu calls Keigo to tell him his son has said heart problem, and if he wants to save him to call a hospital. It is revealed in the credits of the last episode that Yoi's condition is treated.