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...!
As you heard at the entrance ceremony,
،كما سمعتم في مراسم الدُّخول
Wie ihr bereits bei der
Eröffnungsrede gehört habt,
Como oyeron en la ceremonia de ingreso,
Como escuchasteis en la ceremonia de ingreso,
Comme expliqué
lors du discours de bienvenue,
Come vi hanno spiegato
 alla cerimonia di apertura,
Como vocês ouviram na 
cerimônia de apresentação,