is a yaoi manga by the Japanese manga artist Hinako Takanaga, who also authored Little Butterfly and The Devil's Secret. The first volume of this series was originally called  before the series was retitled Challengers.
The yaoi manga "Challengers" is written by the Japanese artist Hinako Takanaga, who also authored "Little Butterfly" and "The Devil's Secret."  The initial title for the first volume was different from its current name.