Perfect world, 7

Itsuki doesn't show any signs of life !? What will the future hold for the four protagonists after facing the great earthquake !? Tsugumi has started working with Itsuki on the project. The works progress smoothly, but the morning of the jotoshiki ceremony, a great earthquake occurs and Tsugumi cannot contact him. To make sure he's okay, he asks his friend Keigo for help and, despite the aftershocks still going on, they go to Itsuki's house together. Upon arriving, Tsugumi encounters a terrible scene.