By the end of this year, single person-households will be the most common living arrangement in South Korea. They will make up 25 per cent of all households, a ratio that's doubled in the last twenty years. Companies are responding to this trend by for example making ready-to-eat or easy-to-cook food, in smaller serving sizes. But the rapid growth in single-person households also worries the government. A lower marriage rate, in conservative South Korea means a low-birth rate, that equals fewer workers to support an aging population. Al Jazeera's Florence Looi reports from Seoul.