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...!
Though I'm much more of a worthless 
weakling than my name suggests,
رُغمَ أنّني أضعف بكثير ممّا يوحي به اسمي
Auch wenn ich ein wertloserer Nichtsnutz
bin, als mein Name anmuten lässt,
Pero soy más inútil de
lo que sugiere mi nombre;
Pero soy más inútil de
lo que sugiere mi nombre.
Je suis comme une pivoine,
fragile et toujours malade.
Sono un esserino molto più debole e inutile 
di quanto il mio nome suggerisca,
Mesmo sendo mais fraca e 
inútil do que meu nome sugere,