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...!
This morning, I put pieces of paper with 
numbers written on them in your desks.
في هذا الصباح، وضعتُ قطعاً ورقيّة مُرقّمة في مقاعدكن
Heute Morgen habe ich Zettel
mit Nummern auf euren Tischen verteilt.
Esta mañana puse papeles con
números en sus pupitres.
Esta mañana puse papeles con
números en vuestros pupitres.
Ce matin, j’ai placé dans vos bureaux
des papiers numérotés.
Stamattina ho messo sotto ogni banco
dei foglietti con scritti dei numeri.
Hoje de manhã eu coloquei pedaços de papel
 com números escritos em suas mesas.