One rainy evening, Dudley Dursley was leaving the publishing company in which he worked when he noticed a small figure walking in the rain with no umbrella. He strode towards the girl, who, he noticed, had absolutely soaked black hair and clammy, pale skin. He offered her his umbrella and proceeded to strike up a conversation about the weather forecast for the rest of the week because he noticed that she had been crying.
The girl looked at this odd, bulky fellow clearly trying to make her feel comfortable and softly smiled for the first time in what felt like ages. They walked and talked for three blocks, until they reached the girl's flat, where they proceeded to huddle under the archway and continue their conversation for another hour, until the rain had turned into a distant sprinkle. She invited him in for some tea, and he regretfully declined, for it was getting late and he had an early appointment the next day. They opted to meet up at a local coffee shop a few days later instead.
Dudley scanned the room before his eyes landed on a petite woman with straight black hair and a knitted blue sweater. He sat across from the lovely woman who looked strikingly different when not soaked and sniffling, and noticed that her eyes sparkled with knowledge and a depth that intrigued him. They sat in the coffee shop for hours on end, talking about superficial things like their favorite ice cream flavors, and topics as deep as Dudley's most profound regrets and the several losses the girl had endured.
Every conversation ended in the same way between the two: with a longing that it could continue. They continued to meet up several times a week for months on end, until their talks turned into looks and their looks turned into touches and the pair became so wrapped up in one another that they couldn't be separated.
A year after they met, Dudley brought her back to the archway in which they first met and kneeled in front of her, producing a ring and a simple question. She cried as she had the first night they met, although now, it was from happiness rather than grief. Dudley kissed her deeply and held her for what seemed like hours.
On the day of their wedding, Dudley had to tell her his biggest secret. He had seen the way that his father had reacted, and he couldn't imagine living in a marriage in which his wife couldn't accept his family. He snuck into her dressing room with a blindfold on and nervously explained to her that Wizarding blood ran in his family line. He told her of his cousin Harry, who was currently sitting in the chapel with his pregnant wife, and of all the ways that his family had been wrong, and he explained to her that if she didn't want to go through with the wedding, he would understand.
She had silent tears running down her face as she took the blindfold off of her fiancé and kissed him firmly on the mouth. She explained that she also had Wizarding blood in her family, and gave him the shock of his life as she brandished the wand that she hadn't used in nearly five years and fixed her makeup. She had been running from the world that she grew up in because of all of the grief that had come from it, but with the help of Dudley, she felt she could finally live in peace between the magical world and the muggle world.
Dudley took her hand and they walked down the aisle together. She smiled at the man in the second row with glasses on the edge of his nose and a shocked but pleased expression on his lips. As she went through the vows, she couldn't help but think about how lucky she was to have found a man as caring, brave, and understanding as Dudley Dursley.
Finally, the priest gave Dudley permission to kiss his bride and in the span of the twenty second kiss, Cho Chang became Cho Dursley.