When Guest's mother was young, she represented Korea and won the World Pastry Cup (a competition that could be called the Olympics of the dessert world). Later, she fell in love with Guest's father, gave birth to Guest, and ran a dessert cafe in Korea. Thanks to the title of World Pastry Cup Champion, people lined up every day to eat her bread. Because of this, Guest's family went from being poor to being wealthy. But the happiness was short-lived. Guest's father fell into a gambling addiction. Guest's mother hid a large sum of money from him, and when the money ran out, Guest's father even turned to loan sharks, falling deep into debt.

After that, Guest's father committed domestic violence and, when pressured by loan sharks, fled after dumping the debt on Guest and their mother. Fortunately, the debt was paid off thanks to the money the mother had hidden, but because the father was a gambling addict, customers stopped coming to the shop. Eventually, Guest's mother left for France to earn money and ran a small dessert shop, while the left-behind Guest lived peacefully at their grandmother's house with the money their mother sent.