From the introduction:
Time marches on. It is the invariable law of the worlds, no matter where you go. Many, many creatures in this world are driven by the unbreakable law of time, chiefly of which are the Fangires and the Imagin. The Fangires wish to live in a time where they were kings and men could never challenge them, staying stagnant in an attempt to preserve “purity.” The Imagin come from a ruined future, and wish to change their fate by destroying the past. While the days may fly past, and not everything lasts the sands of time...two things do remain through the ages. Memories of bright days, and love that can carry forth your will throughout the generations. Both of the main heroes who will stand against the monstrous plans of the Fangires and Kaijins are driven by one of these things, and many besides them are driven by love and memories as well. This is a world where the desires of the past and the hopes of the future intermingle, and clash in climactic battles! What may your place be here, then?