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...!
That dog was just biting you!
!كان ذلك الكلب يعضّكِ
Das wollte dich
doch nur beißen!
¡No hizo más que morderte!
¡No hizo más que morderte!
Il ne pensait qu’à te mordre !
Altro che venirti incontro, 
ti stava mordendo!
O cachorro estava só te mordendo.