Karneval (TV), Makai Ouji: Devils and Realist Recommendations
-Both involve a guy protecting the main character
-Both give off same aura and feeling into the anime
-Both anime similar setting time of era
-Both anime involves supernatural
-Both anime involves main character has powers but they don't know
-Both anime has action
-Both are dark at times yet funny
-Both really good
Makai Ouji and Karneval are published by the same company. Both series deals with supernatural things. Lots of bishounen characters. The opening animation has that Karneval feeling.
These shows have a similar feel due to the fantasy elements used and the extraordinary powers the characters possess.
They both are about a cute main character and other hot characters protecting him ,
both have to do with fantasy