Master, with a Capital M

Ichigo finally convinces his roommate, Shuuhei, to take him along on one of his visits to his kink community. He's not totally sure what he's looking for, but when he meets the owner of the group's gathering place, 'The Master', he's pretty sure he's found it. - This is an AU, BDSM, Aizen/Ichigo slash, with mentions of Shuuhei/Ichigo. Warnings inside, for lack of space!