Shirogane no Seija
Fist of the North Star Toki Side Story: Silvery Savior (銀の聖者 北斗の拳 トキ外伝 , Shirogane no Seija: Toki Gaiden) is a manga series by Yuka Nagate. It was originally serialized in Weekly Comic Bunch from September 7, 2007 – December 12, 2008. It was later released in six tankōbon volumes.
Plot
This story is a spinoff to the original Fist of the North Star by Buronson and Tetsuo Hara, and covers the events of Toki's life prior to his appearance in the manga and also retraces chapters of the original story.