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...!
the pain from my hair getting 
caught, I'm totally fine.
والألم النّاجم عن تعلُّقِ شعري، أنا بخير تماماً
und dem Schmerz, weil sich
mein Haar verfangen hat, ist alles prima!
y de que mi pelo quedó atorado, estoy bien.
y que se me ha enredado el pelo, estoy bien.
et mes cheveux qui me tirent,
e il dolore per i capelli rimasti impigliati,
va tutto benone.
a dor do meu cabelo ter 
ficado preso, estou ótima.