The Devil's Secret
The Devil's Secret (アクマのひみつ, Akuma no Himitsu) is a Boys Love manga by the Japanese manga artist Hinako Takanaga, who also authored Little Butterfly, Challengers and The Tyrant Falls in Love. It is licensed in English by 801 Media and in German by Tokyopop Germany. Source: Wikipedia (en)
Series - wd:Q3607405