Synopsis
Right after Kizuna Todoroki claimed victory at the World Martial Arts Tournament and used the prize money to pay off her grandfather's enormous debt of one hundred million yen, a reporter visits her home. Impressed by Kizuna's feat of beating the reigning champion who had held the title for ten years, the reporter plans to write an article highlighting Kizuna and the Wadachi Ju-ken martial arts school her grandfather founded. But as the interview wraps up, several challengers show up at the Todoroki house. Upon learning that Kizuna is only twelve years old, these fighters aim to defeat her before she turns thirteen and take her world championship title. With a steady stream of opponents arriving, Kizuna struggles to hold them off while the reporter investigates the Todoroki family's past more deeply.
