 If you liked
xxxHOLiC
|
 ...then you might like
Kuuchuu Buranko
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This may seem crazy, seeing that xxxHolic is a supernatural show and Kuchu Buranko is about psychological disorders, but if you look beyond their genre they really are rather similar.
Both shows involve the main characters and their sidekicks solving people's problems; both make you look at things from a different perspective; and both have problem solvers who are rather crazy, Irabu in one and Yuuko in another. Effective, but crazy.
Plot-wise, xxxHolic and its sequel are more developed as there are way more episodes, but they're both equally entertaining.