When five lovely young girls who hate studying hire part-time tutor Futaro, he guides not only their education but also their hearts. Time spent has brought them all closer, with feelings growing within the girls and Futaro. As they finish their third year of high school and their last school festival approaches, they set their sights on what’s next. Is there a future with one of them and Futaro?
Yotsuba, we're always one-fifth of each 
other, no matter what we're doing.
Yotsuba, was auch immer sein mag,
wir fünf bilden ein Ganzes.
Somos una quinta parte de cada una,
no importa lo que hagamos.
Somos una quinta parte de cada una,
no importa lo que hagamos.
Yotsuba, on partage tout,
tout ce qui nous arrive.
Yotsuba, qualunque cosa facciamo,
ognuna di noi è un quinto.
Yotsuba, somos sempre um quinto uma da
outra, não importa o que estejamos fazendo.
Ёцуба. Что бы мы ни делали,
мы останемся одной пятой друг друга.