The whole big unicorn thing on the Secret cover is not real... however, there's a big wing+heart tattoo hidden on the cover that's one of the "secrets" of the album.
It was true according to older 2004 "love PB" shots between Ayu and Nagase... and seeing as how she had the tattoo in 1LOVE and the AT08 lives as well, it confirms it even further.
alternarist, why are you being a jerk? :|