The Billionaire's Bride of Convenience: Harlequin comics

As the son of a distinguished family, Hugh is temporarily forced to take on the role of CEO in place of his father. While Hugh used to be a playboy-type that favored women over work, his competent secretary, Kathryn, cuts out any time for play in his schedule, leaving him nothing but work-filled days. Despite his resistance in the beginning, Hugh finds himself slowly falling for Kathryn to the point where he hardly even looks at other women. One morning, upon seeing Kathryn with a bruise on her face and her eyes swollen from crying, the feelings Hugh kept inside come flowing out all at once…