Super Jump
In 2000, a sequel entitled "Ring ni Kakero 2" was published in Shueisha's "Super Jump", a "seinen" magazine. "Ring ni Kakero 2" tells the story of Kiku and Jun's son, Rindo Kenzaki, who is raised by Katori Ishimatsu after losing both of his parents. The series ran on an irregular basis until 2008. Shueisha compiled the individual chapters into twenty-six "tankōbon" volumes published between July 9, 2000 and February 9, 2009.