Meet Sousuke. He's just your average high school kid, living in a rural town. Ever since his father remarried when he was young, he's been living together with his little sister Nanaru.
Together with his childhood friend Maho and their other friends, they have fun geeking out in the Otaku Club.
Sousuke enjoys those tranquil, peaceful days... But then one day, only one month before summer break, that peace is shattered.