Fuutarou Uesugi is a poor & anti-social top student. One day, he gets a job tutoring a rich family that's new to town. Fuutarou's soon-to-be students are revealed to be his new classmate, Itsuki Nakano, and her four quintuplet sisters. Despite the girls' poor first impression of Fuutarou, he tries seriously to do his job, only to find they have terrible grades and terribly complex personalities.
English translation of the Japanese manga Go-Toubun no Hanayome (五等分の花嫁).