The second part in a series of adventure games developed under Koei's "English Dream" label. Yuri continues to unlock the secrets of the tunnel in the bookstore's basement, including meeting another version of herself.

After Yuri's friend Outa Ichirou tells her that he met her the other day, even though Yuri hasn't seen Ichirou for a year, it becomes clear that a dimensional doppelganger is trying to steal her identity.