The story centers around class 1-7 of Tennomifune 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.
本作描述在天之御船學園1年級7組中,聚集大批背負著「不幸」或稱為「負業」的學生們。少女「雲雀」也是這些學生中的一人,她將和入學第一天就認識的不幸「花子」、不健康「繃太」等人,為了獲得「幸福」而展開一段平凡(!?)高中生活。