In the winter of his first year in high school, Maru Sueharu fell in love with Kachi Shirokusa, a genius novelist who happens to be his classmate. But since it was his first love, time only continued to pass by while he could do nothing. As his so-called friend Tetsuhiko chides him and his childhood friend Shida Kuroha teases him, he overhears his crush Shirokusa saying she has a boyfriend now. His heart broken before he could even confess his feelings, Sueharu is devastated. Then Kuroha proposes that they get revenge...
Yes! Every man has a thing or 
two he wants to keep secret!
!أجل! لكلّ امرئٍ أشياء يريد التستّر عنها
Genau! Jeder Kerl hat das eine
oder andere zu verbergen!
Exacto. Todo hombre tiene un par
de cosas que quiere ocultar.
Exacto. Todo hombre tiene un par
de cosas que quiere ocultar.
Oui !
Sì! Ogni uomo ha una o due cose
che vuole mantenere segrete!
Isso mesmo! Todo homem tem uma ou duas
coisas que quer manter em segredo!
Да! Ведь каждому
есть что скрывать! Это факт!