Billionaire's large-size repairman

Mara, a plus-size female mechanic, was publicly jilted by her snobbish fiancé and kept being drained by her biased birth family, when she unexpectedly saved Gray, who had been in a car accident and was hiding his identity as a billionaire. As they supported each other, humiliated the scummy man and his despicable mistress, and fought against the family's power-grabbing conspiracy, they bridged the gap between their social statuses: Mara established herself firmly with her own repair skills, while Gray learned to respect and listen. Eventually, the two fell in love on an equal footing, reaping a bumper harvest in both career and romance.