X, Code Geass: Boukoku no Akito 2 - Hikisakareshi Yokuryuu Recommendations
Dark atmosphere surrounds both stories as people fight unaware of the fact that betrayal is coming.............Supernatural powers is highly involved as well. Characters in each sides have relationship with one another. The upcoming battle is going to shock everything. Interesting note is that both of the main characters have a relationship with another in the past (Akito and Shin=Subaru and Seishiro Suzaku and Julius(possibly Lelouch)=Kamui and Fuuma).