That perfectly curved fastback shape makes a hardtop vert look impossible. The break lines on the roof look fake, and yeah, you can see it's hiding a B-pillar beneath the rear window.
Past: '08 E92 335i|JB|wheels|"eater of HPFPs"
Present:'15 Mustang GT|401A|PP|Recaros|6MT
Sig pic unrelated. I like to go sideways and stuff.