XBlade

XBlade (クロスブレイド) is a manga series written by Tatsuhiko Ida with illustrated by Satoshi Shiki. It was serialized in Monthly Shōnen Sirius from November 25, 2006 to December 25, 2010. Its sequel XBlade 十 is written by Tatsuhiko Ida and illustrated by Satoshi Shiki. It was serialized in Monthly Shōnen Sirius from January 26, 2011 to August 26, 2013.

XBlade
Four years ago, a large scale disaster in Tokyo claimed two million lives. The remaining thirteen districts of the city were isolated into the Tokyo Barricade Zone. Morisaki Harumi, an unruly kid with great fighting strength, is his family's sole survivor from the incident.

One day, in a traffic accident, Haru gets pulled into a world of violence and meets Mana, the girl who turned herself into an ancient sword.