She has such a terrible sense of direction that it takes her three hours to commute to school alone. She loves her childhood friend, Ren, as her "Number 1." Because of her unyielding personality, she can't admit that she has no sense of direction. Additionally, she becomes very hostile toward every female who approaches Ren.

The story centers around class 1-7 of Tennogofune Academy, where all the students with "bad karma" or misfortune seem to have been gathered. Hibari, a student in this class, meets the unlucky Hanako and the perennially unhealthy Botan on her first day of school, and together they try to find a way to turn their school life into a happy one. 
 
(Source: Anime News Network)

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At Tennomifune Academy, students with "negative karma"-the kids who are practically weighed down by misfortune-are all collected into one place: Class 1-7. On the first day of school, Ruri Hibarigaoka (Hibari) meets fellow 1-7 classmates Anne Hanakoizumi (Hanako), a girl up to her ears in bad luck, and the all-too-frail Botan Kumegawa (...Botan). These fast friends just want to have a fun high school life, but are they pushing their luck...?! 
 
(Source: Yen Press)
 
Note: Includes 2 extra chapters.

Hibiki Hagyuu