[READING ORDER: Aika Crisis > War Cloud > Dawn and Dusk > Satori Effect]

A young, diabolical man named Satori approaches you, forces you to come to his extravagant mansion, dances as he flaunts the corpse of your best friend, and makes an ultimatum with you; 'Help me find the cure for my affliction, or join her in death.'In the fourth arc of Death by Ex-Girlfriend, that is exactly what Osamu Ashikaga and his band of wives must go through. Not only must they deal with a madman, but their dreaded task also forces him to meet yet another goddess, one who, just like Izanami, cannot die. This mysterious goddess is the source of Satori's affliction, but also a person who is dear to Izanami. Just what is her name? What is her affiliation with Izanami? How can Osamu bring an end to her curse so that everyone leaves satisfied?

Osamu will have to work together with Satori to uncover the answers.