Second-year high school student Aizawa Akito was asked by chance to pretend to be the boyfriend of Mizutani Karin, the most beautiful girl in the school and in the same class as him. At first, Akito refused, but he could not leave her alone, so he finally agreed. Their relationship began with the intention of “pretending” to be each other’s lovers, but… “Umm, Mizutani-san? I have a cold. You shouldn’t sleep on my chest….” “….It’s fine. If it’s Aizawa’s cold, I don’t care if I catch it.” This was a story of two people who started a fake relationship until they grasp the real thing.