Noji-kun is the school's number one kiss addict and a total playboy. For him, kissing is a form of thanks and greeting. He doesn't discriminate between genders. One day, after kissing someone as thanks for picking up his earring in his usual style, he gets a kiss back that knocks him off his feet. His opponent? A seemingly unremarkable, introverted guy with glasses named Hiura. Noji gets hooked on Hiura's kissing technique and finds himself completely at his mercy...