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...!
Yeah. Aside from being 
bitten by this doggy and
نعم، بغضِّ النظر عن تعرُّضي للعضِّ من هذا الكلب
Ja. Abgesehen davon, dass ich von
diesem Hündchen gebissen werde,
Sí, aparte de que el perrito
me está mordiendo
Sí. Si no contamos que el 
perrito me está mordiendo
Oui.
Sì. A parte questo cagnolino
che mi sta mordendo tantissimo
Sim. Apesar de ter sido
 mordida por este cachorro e