Prologue; Hitomi's Time
5000 AD, a time gate once led to a forgotten world - Hitomi no Toki.
Many people have searched for the world behind the Gate of Time, but found nothing.
5,000 Years later, the door of time opened wide, and many unknown wanderers accidentally entered the door of time. Unfortunately, they were drawn into another world, and they never returned. The door to Hitomi no Toki is opened by the Key of Time, waiting for those who can enter the world.