A manga adaptation of the original Kamen Rider Kuuga TV series, the series is published in the monthly HERO'S magazine since the magazine's December 2014 issue, and is still ongoing with new chapters being published in the Comiplex website. The manga is written by veteran Kamen Rider writer Toshiki Inoue (Kamen Rider Agito) with art by Hitotsu Yokoshima (Bateren XX, Akuto-ACT). Though it is a manga adaptation of the original TV series, there are some differences, most notably, the meeting of Kamen Riders Kuuga and Agito (Yukina Sawaki).
[via Anime News Network]