Perfect World manga volume 7 features story and art by Rie Aruga.

Things seem to be going more smoothly for Tsugumi and Itsuki - their complicated past aside, collaborating on a new project together seems to allow them an ease that eluded them in romance. On the morning of the ribbon cutting, however, there is a big earthquake in Tokyo, and Tsugumi can't reach Itsuki. In her panic, she turns to the only person she can think of to help her make sure Itsuki is okay...