 If you liked
Kamichama Karin
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 ...then you might like
Cardcaptor Sakura
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Both manga feature girls in the same age group that discover they have magical/god-like powers, and both feature a light romance between the main protagonist and a male lead.
Cardcaptor Sakura and Kamichama Karin are two magical girl series that feature a main character who learns she has magical potential and has to learn to use it efficiently over time. The two series have very similar story progression, which is mainly spending its time on the characters' daily lives, some similar characters (Himeka and Kazune remind me of Tomoyo and Syaoran respectively), and attractive art that will easily attract fans of shojo manga.