Set in a world where history has taken a slightly different course from the one we're familiar with. In Shizume City there is a psychic war between seven kings. The story goes that the Third King, known as the Red King, created a group called HOMRA filled with extraordinary people. If you manage to join HOMRA, you also acquire unbelievable psychic abilities.
Excellent backstory for the anime, the only downside is the more you learn about Tatara Totsuka, the more tragic his death in the anime is. As if it wasn't tragic enough already. I did find it hard to tell the various characters apart when they aren't in their iconic outfits, however. There seems to only be a couple of hairstyles for the guys of HOMRA. Learning more about how the different characters joined HOMRA was intriguing. If you liked the anime, you'll love the backstory manga.