Hakkenden: Touhou Hakken Ibun 2nd Season

Lots of cute bishounen characters who are demons. All of them are brought together due to a certain event. The main character is linked to this event and must uncover the mystery behind it. There are yaoi like moments. Similar voice actors can be heard in both series.  

-Both story involve a child with supernatural power to solve everything. -Both story involve a child who need to get protected by their guardian or butler. -Both story involve a child who could not done anything by themselves. -Both story involve a child who live by themselves with their guardian without their real parents. -Both contain a bad guy who want to get the special power. -Both contain a childhood friend who become their guardian or butler. -Both contain a bad guy who want to reach their target and will do anything for it. -Both contain a cute child (main character) who get liked by everyone and has lots of friends and easy in making friends. -Both contain a task that are given to them to solve the mystery. -Both story are about their adventure and solving mysteries.  read more 

-Both main characters have to look allies who will help them and they all represent something different. -Both MCs can go evil at certain times like Shino goes insane when important people he cares about are in danger and the MC in Brave 10 goes evil at times when there is blood. -Both MCs have a guardian with them although the MC in Brave 10 is a girl. -The MCs also have someone after their power and want to use it for evil. 

Draws inspiration from mythology; Japanese mythology. There is a princess who will be resurrected once the conditions are met.  

The continuation of the first season. There are Oni and tengu but they are in human form. Both series protect the main female who is very important to them. 

Similarities: Both have the same supernatural, action, and shounen genres, a yaoi element in them, and involve young boys with special abilities. Dissimilarities: One has a second season, while the other doesn't. The MC in one anime is a damsel (or boy) in distress, while the MC in the other anime is the one who kicks ass. One anime has a very corny ending, while this one... you'll just have to wait and see. 

Similarities: -Continuation of the first season -Plot unfolds -Bishounen characters( Yokais etc) -There are oni, tengu, mountain god, and many other Japanese mythologies/folklore  

both of supernatural aura, and both have a protagonist with a strong bond of a friend-brother bond with a familiar, if u liked Hakkendedn u wil love it