Severely allergic to felines, Yuuto Amakawa spends his mornings nursing a drippy nose courtesy of his friend Rinko's cat. But on his sixteenth birthday, it's not just Rinko's pet that's riling up his allergies - to say nothing of his hormones! Appearing before him is Himari, a buxom, sword-wielding cat spirit in human guise who has sworn to protect Yuuto, now the target of vengeful spirits! It's clear that Yuuto's allergies are the least of his problems - he's gonna need Himari's help if he wants to live to see his seventeenth birthday!
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