Love can blossom in the most unexpected circumstances, and this is especially true for Ryou Amakusa, a wealthy and brilliant playboy. One rainy morning, he nearly falls down a staircase but is saved by a girl named Ichika Arima. That same evening, Ryou coincidentally meets Ichika again, and it turns out she is the best friend of his younger sister Rio.
Wanting to show his gratitude, Ryou tries to win her over with his usual flirtatious charm, only to be instantly rejected because she finds his behavior off-putting. Far from being discouraged, Ryou becomes even more captivated by her. He begins putting in effort to gain Ichika's affection, even though she consistently shows disgust at every encounter. However, as time passes, will Ichika eventually stop being put off by Ryou's relentless, yet unsettling, attempts?
