YongSeo Couple is a couple from the South Korean reality TV show We Got Married. The husband is singer and actor Jung Yong Hwa, and the wife is singer Seohyun. The couple's name YongSeo was coined by combining the first syllables of their names, Yong from Yonghwa and Seo from Seohyun. They appeared as a virtually wed couple in the show for over a year. They are also known as the "Sweet Potato " Couple, due to Seohyun's massive love for them.