C.C. C.D. Butt
This is far from the most egregious butt-facing pose C.C.'s ever been in, and tbh I think the art looks really cute, although the rule that her butt must always always always face the audience viewpoint seems to still be in full force. xD But her lower half still looks pretty awkward.
Because this is a CD cover, I think the especially odd thing about it is that it means that on the actual CD, you wouldn't even see her in a boobs and butt pose. Her butt would just be the back of the sleeve.
(CD cover of Code Geass: Lelouch of the Rebellion R2 OST 2, Miya Records, submitted by anonymous)