The Runaway Groom's Regret

Daphne's groom failed to appear on the day of their wedding. Daphne was so devastated by the breakup that she lost control and drank all night, eventually running into Nathan, a successful businessman who had recently relocated to the country.
Daphne, inebriated at the time, barged into Nathan's private meeting, causing him to lose some of his most lucrative clients. Daphne spent the night in detention as a result of this incident.
As an apology for Daphne's hasty actions, however, Nathan offered her a deal - to be naughty nephew's private teacher.
Later on, Daphne learns that Nathan is the man who caused her misery years before. He is her ex-groom.