Let's Complete Earnestly!

In the midst of the troubles with Lulu and the ?-eggs, Kukai joins Tadase, Nagihiko, and Yaya in a reunion with the original four guardians. Here Kukai not only finds out that Yaya knows Nagihiko's secret, but that the history of the Guardians is longer than he thinks. With this in mind, Tadase proposes a new idea to preserve the history of the Guardians.