On the day of the Tennomifune Academy entrance ceremony, in the class 1-7 classroom, Hanakoizumi Anne (Hanako), Hibarigaoka Ruri (Hibar), and Kumegawa Botan (Botan) are told by their homeroom teacher Kodaira-sensei that they are unfortunate and unhappy students.
The goal of the students of class 1-7, who are burdened by a variety of forms of misfortune, is to become happy.
The three girls have trouble accepting their circumstances, but they're immediately given an unexpected assignment...!
Before the entrance exam, 
this school conducts
قبل امتحان القبول، تُجري هذه المدرسة
Vor der Aufnahmeprüfung
stellte diese Schule
Antes del examen de ingreso, la escuela
hace una investigación supersecreta.
Antes del examen de ingreso, el instituto
realiza una investigación supersecreta.
Le lycée a mené son enquête
avant l’examen d’entrée.
Prima degli esami di ammissione, l'Accademia
Antes do exame de admissão, a escola conduz