 If you liked
Karneval
|
 ...then you might like
Sennen Meikyuu no Nana Ouji
|
Both are Josei and feature a young protagonist accompanied by older adults who protect the protagonist. Both stories feature the lead protagonist to be innocent, sweet, kind, and cute. Both have interesting plots and include similar character tropes.
If you like Sennen Meikyuu no Nana Ouji, you'll love Karneval!!