April 7: An Unfortunate First Day of School. On her first day of high school, Ruri "Hibari" Hibarigaoka comes across an unlucky girl named Anne "Hanako" Hanakoizumi dangling off a bridge while rescuing a dog. After Hanako and Hibari meet their fragile classmate, Botan Kumegawa, their homeroom teacher Kodaira reveals that, unlike the other classes dedicated to sports and arts, Class 7 is filled with allegedly unfortunate students who must strive to obtain happiness. After being tasked with taking care of an egg without breaking it, Hanako and Botan get in a jam while trying to rescue a cat, but are soon aided by Hibari, who is revealed to have an obsession with a construction sign. The next day, Hanako's egg, the only one that didn't break overnight, hatches into a chick.