Ryotaro and Hana decide to clamp down on the Imagin possessing him out of fear of Den-O's health; as Ryotaro encounters a former classmate nostalgic for the past.

After encountering the mysterious Past Man, Ryotaro decides to stay in the past in hopes of determining who he really is, even at the risk to himself.

The DenLiner crew discover an anomaly associated with the missing future as Hana suddenly transforms into a young girl.