Duklyon - CLAMP School Defenders v01-v02 (2003)

English translation of the Japanese manga Gakuen Tokkei Dyukarion.
Someone's been kidnapped, and the Duklyon duo are the only ones capable of saving the day. Well, actually Clamp School Detective Akira Ijuyin would rather save the girl himself, seeing as it is his girlfriend who was kidnapped, and he'd certainly do a better job of rescuing the girl. But the mysterious Director has other plans. His Duklyon defenders will save the girl whether they like it or not!