Tenmagouka - RG Veda part A & part B

Clamp, stylized as CLAMP, is an all-female Japanese manga artist group that formed in the mid 1980s. Many of the group's manga series are often adapted into anime after release. It consists of their leader Nanase Ohkawa, who provides much of the storyline and screenplay for all their works and adaptations of those works respectively, and three artists whose roles shift for each series: Mokona, Tsubaki Nekoi, and Satsuki Igarashi. Almost 100 million Clamp tankōbon copies have been sold worldwide as of October 2007.