For four years, childhood friends Yukiya Asagi and Miku Sakura have been playing something they call the "love game." The rules are simple: they declare love to one another, and the first one to blush loses. Yukiya is set on winning against Miku, going as far as to read her favorite manga and change his appearance, but no matter what he does, Miku always seems to be one step ahead.

Now in high school, Yukiya and Miku have slightly changed the rules of the game. They can do just about anything to fluster the other party and force them to admit defeat—but it usually ends in a tie. Their true feelings could not be more apparent—yet the stubborn pair refuses to stop the game, even if they can barely control their growing affection.