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?
Itsuki's the only one I get to call 
my beloved younger sister.
Itsuki ist die Einzige, die mich als
ihre ältere Schwester bezeichnet.
Itsuki es mi única hermana menor.
Itsuki es mi única hermanita pequeña.
Itsuki est la seule avec laquelle
je peux me comporter en aînée.
Itsuki è l'unica di cui posso vantarmi dicendo
che è la mia adorabile sorellina.
Itsuki é a única que posso chamar
de minha amada irmã mais nova.
Одну только Ицуки я могу назвать
своей милой младшей сестрёнкой.