 If you liked
Kiseijuu: Sei no Kakuritsu
|
 ...then you might like
Tsukimonogatari
|
The main male protagonists from each of these series must come to terms with losing his humanity and turning into an inhuman/supernatural being. Araragi and his vampiric powers; Shinichi and the sensory/physical bonuses he gains from the parasite symbiote in his body. On top of that, glorious, well-done animation and sound design.