 If you liked
Yuu☆Yuu☆Hakusho
|
 ...then you might like
Kiseijuu
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The main characters, Shinji and Yusuke, share a lot of similar situations and decisions.
The way Usuke and Shinichi has to balance school life with the supernatural or alien plot is very similar; The Chapter Black arc is particularly comparable with Parasyte having the same feel of a thriller with cat and mouse style narrative, chases and characters having to outsmart one antoher.