The Prisoner Series was first uploaded by Shuujin-P with Len narrating his life in his point of view (however the first "original" version was sung by Rin; later it was removed from Shuujin-P's mylist of VOCALOID song, however is still available to see in his channel), and later Paperplane was uploaded to tell Rin's side of the story. It tells about the world, and war at that time. Characters such as Rin's father is shown in this series.