If you liked
Another
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...then you might like
Kotoura-san
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Both have mystery elements and an assailant who is after multiple characters in the show. Another is far more gory/gruesome but there are a fair share of bloody scenes in Kotoura-San. Both also involve high school daily life but with a twist.
If you liked
Uta no☆Prince-sama♪ Maji Love 1000%
|
...then you might like
Amnesia
|
Both are based off of Otome games and have reverse male harems! The main female character goes down each guys' route in both series (but there is only implied romance in Utapri whereas the female protag dates the guys in Amnesia). Watch them if you love bishi male characters!
If you liked
Shin Shirayuki-hime Densetsu Prétear
|
...then you might like
Amnesia
|
Both series have the main girl character surrounded by a group of infatuated bishounen males. Amnesia is more like a reverse harem, but Pretear is the closest a magical girl series has gotten to this, imo. Watch them if you want to see cute bishis in every episode.