Naruto Gaiden: Uzu no Naka no Tsumujikaze

Naruto: The Whorl within the Spiral,Minato One Shot Manga

The story of Minato Namikaze (Fourth Hokage), the winner of the world-wide popularity poll project—NARUTOP99! Just how exactly did Minato, the father of Naruto, develop a certain jutsu...?

(Source: MANGA Plus)