When Ryou Amakusa, a wealthy and charming playboy, is rescued from a near-fall by Ichika Arima, little does he know that she will become more than just a passing acquaintance. After discovering Ichika's connection to his sister, Rio, Ryou decides to pursue her romantically. Despite his initial off-putting advances, Ryou finds himself more drawn to Ichika with each rejection. Determined to win her affection, he persists in his unconventional courtship, leaving Ichika torn between disdain and the possibility of unexpected feelings blooming between them.