Magician Brothers Syd and Lid

From Storm in Heaven:

Magicians, people with magical powers that have caused their kind to be hated and feared throughout the centuries. This manga contains their tales — of magic for both good and evil, the struggle to fit into society, and a dark past that haunts them both.

The series includes:

vol1. Romanesque Variee
vol2. Mystic Variee
vol3. Classical Variee
vol4. Sweet Variee
vol5. Silouette Variee
vol6. Crescent Variee
vol7. Secret Variee

Title: Magician Brothers Syd and Lid, Mahoutsukai Syd & Lid Series
Creator: KiKi
Status: Ongoing
Genre: Shounen-ai, Shoujo, Drama, Adventure, Fantasy, Mystery