Himitsu ~Kuro no Chikai~
(http://66.media.tumblr.com/48108acd17d076354dbb194590baf1c2/tumblr_inline_mzo2dmCrKQ1qcp61e.jpg)
Description
Based on the popular Vocaloid song Alluring Secret ～Black Vow～.
Rin, a young angel (presumed female, but angels don't have clear genders) falls in love with a young human girl, Miku. However, their love is considered taboo, and so, Rin makes a deal with the devil to be reborn as the human boy, Len, in order to be with Miku. However, their happiness together is short-lived, and even that soon ends in tragedy.
Download:
http://sh.st/SXKW5