Of all the glorious outfits worn by both Atobe and Mizuki, I am going to have to pick the infamous rose poncho shirt worn by Mizuki. It's just so... flamboyant.
The lavender ruffled pajamas from Futari no Samurai worn by Atobe are a very, very close second.
(I originally posted this at
http://fulminata.dreamwidth.org/283901.html.)