Kohaku is a rather accident-prone angel who has come to Earth in search of her mentor, Hisui. When she gets trapped in a tree and attacked by a crow, she is rescued by Shuichirou, a young doctor. As a result, she feels indebted to grant him one wish but finds the kind doctor is satisfied with all aspects of his life. Thus, she remains with Shuichirou in hopes of repaying him somehow (subsequently getting in other sticky situations as a result).
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