Akumetsu and Wolf Guy are both created by the same author and artist, so the art is of course similar, with tons of violence and a struggle that turns more and more desperate as the climax approaches, as the lead is forced to handle the situation without the use of his talents
Wolf Guy and Kokou no Hito not only are akin in art style, but also their protagonists show some amazing similarities. Optically, but especially in their characteristics. Both are rather sociophobic and try to remain isolated, both partially have a very sinister and dramatic atmosphere.
Wolf Guy feels like an "aggressive brother" to Kokou no Hito to me.
Both Main Characters try to stay isolated and away from people and life around them after they experience losing their love ones at a early age. Both Protagonists are very strong and powerful and trouble appears where ever they seem to go. As the story of both Manga's start to reach it's climax, we see a love interest start to develop but also character growth/development.
Both involve protagonists being neither men nor beasts but a combination of the two (a devilman / a werewolf). The protagonists end-up suffering and lose almost everything. Tragedy and extreme bloodshed. (Both mangas include gore and nudity).
These series are enveloped by the same atmosphere, after a few pages of reading Killing Bites I immediately though of Wolf Guy: Ookami no Monshou. They both deal with supernatural creatures and seem to have a kill or be killed undertone. If you enjoyed reading Wolf Guy, I'm sure you'll find Killing bites rather interesting!
Sun-ken Rock is the lighter and more comedic version of Wolf Guy. Ken, the protagonist of Sun-ken Rock, resembles Haguro of Wolf Guy, but Ken is much less scary, although as muscular as Haguro. And as strong as him. Both are about gangs, more or less. Not to mention both have explicit scenes. And rape.
Kangryong is a high schooler unlike others. He has always had a dream of being the strongest. One day he meets Youcheon, who teaches him a powerful skill. One year later, people come to see him and announce that his "master" is dead. Because he was his only student, Kangryong has to follow them and go to a school where everybody has supernatural powers.
the main character are both the cool lonely type. both manga contain much violence and a bit of ecchi. although the story line are quite different, one about werewolves in modern times and the other about samurai in the historical times, the protagonist and their partners are totally similar, yuya is alot like aoshika and kyo alot like inugami. for those who enjoyed SDK, wouldn't you give this manga a try? =D if you are looking for intense romance, both mangas might not be for you, since its more to the action seinen side!