From Tokyopop:
Misha has just moved in next door to Kotarou Higuchi and swears she will protect him at all costs. Unfortunately, she's not too familiar with the ordinary world, as she is an angel who has lived in Heaven until recently. She has no idea how things work on earth and ends up causing more trouble.
KOGE Donbo
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Karin is an average girl...at best.
She's not good at sports and gets terrible grades. Plus, her parents are dead and her beloved cat Shi-chan just died, also. She's miserable...but everything is about to change. Because little does Karin know that her mother's ring has the power to make her a goddess!
Soon she and Kazune, a brusque but cute boy with godlike powers of his own…
From Del Rey:
Karin is your lovable girl-next-door type - if the girl next door also happens to be a goddess! Karin has a magic ring that gives her the power to do anything she'd like. What she'd like most, though, is to live happily ever after with Kazune, the boy of her dreams.