A high school boy named Matsuura has always lived his life by putting up a front. While he can easily see through the true nature behind others' smiles, he encounters a formidable opponent in the form of a cheerful, twin-tailed beauty named Kyuuragi, who is part of the popular group. Whether it's intentional or innocent, her every move and gesture is cunningly calculated, catching Matsuura off guard… “Stop it! I'm going to fall for you!!!”