The Secretly Married Mrs. [Showbiz]

The super idol who used to love partying has recently stopped getting into trouble. He dyed his hair back to black, stopped going to nightclubs, and not a single entertainment paper has printed a rumor about him with anyone of the opposite sex. His fans think something is very wrong. Then one day, they notice their idol has started putting on weight. His bandmates tease him: "You look like a married man." A certain Dragon is startled. (Could everyone know my secret?) YoonA says: (Your idol got fat.) How is that my fault? Theme: