Tested by Her Sister Before the Wedding

Herry Lynn is a deliveryman who has fallen for a wealthy young woman, but her family looks down on him for his humble job. Determined to prove he is worthy of her, Herry gains access to a mysterious True Love System that begins to reshape his circumstances. As his life slowly changes, he must face the doubts of those who consider him beneath their daughter and sister, while his affection for her keeps growing stronger.