Levius (レビウス) is a Japanese manga series written and illustrated by Haruhisa Nakata. The series was published in Shogakukan's Monthly Ikki from December 2012 to September 2014, when the magazine ceased publication. Shogakukan compiled its chapters into three volumes. A sequel, titled Levius/est, was serialized in Shueisha's Ultra Jump from April 2015 to June 2021. The manga and its sequel are licensed in North America by Viz Media. A 12-episode original net animation (ONA) adaptation produced by Polygon Pictures premiered on Netflix in November 2019.
Story
In the 19th century, Imperial City is heavily damaged in a war. A new sport known as "Metalboxing" (which combines the elements of boxing with robotic elements) is developed five years later. Levius Cromwell, who lost his father during the war, begins to emerge as a young fighter and begins training under his uncle Zacks Cromwell after losing his consciousness. Levius works up the boxing ranks until he finally reaches his goal, which is an opportunity to challenge for the promotion to Grade I, which is the highest rank any boxer could achieve. Levius was required to defeat Hugo Stratus to achieve that rank, but Hugo was unexpectedly defeated by a mysterious boxer named A.J. Langdon. The dignity of human beings and the future of Imperial City are in the hands of an ongoing battle between Levius and his opponents.