Ryo Daimon is 19 years old and holds the position of leader of the Daimon Group. One day, Daimon got into a traffic accident. The other party was Kasumi, the daughter of the chairman of the Benibayashi Group, which is an enemy of the Daimon Group. During that accident, Daimon falls in love with Kasumi, but due to their respective positions, the two cannot bond easily. Will Daimon be able to marry Kasumi after overcoming various difficulties, such as the marathon race covered in haze and Kasumi's disappearance? Also, what is the meaning of the chairman of the Benbayashi Group giving Daimon so many difficulties? !? A big twist awaits you at the end, which will leave you impressed and satisfied!