Later during the 21st century, an organization called "The Company" are tasked with retrieving and securing the descendants of said martial artists by turning them into "Pets", mindless hitmen against various targets who might pose a threat.

Tsukasa and Hiroki, a master/pet duo who goes by the name Tsubushiya follows orders from the company as they slowly begin uncovering its secrets as well as a plot involving colleague Satoru and his former foster father, Hayashi.

Written and illustrated by Ranjō Miyake, Pet was serialized in Shogakukan's seinen manga magazine Weekly Big Comic Spirits from July 29, 2002,[6][7] to October 27, 2003.

[13] The series was originally scheduled to premiere in October 2019,[22] but it was delayed to air from January 6 to March 30, 2020 on Tokyo MX, BS11, and AT-X.

[25] In December 2020, Sentai Filmworks announced the acquisition of the series for home video and digital release in North America.