Why did Andy buy Teen Top members food?

Teen Top member Niel posted a picture of Andy and Teen Top members along with the comment, "Why is Andy buying Teen Top food? It will be revealed today on 'Idol Athletics Championships'."

In the picture, Teen Top members are eating a table full of food while Andy is indicating the scene with his hands. 

Andy's appearance grabbed attention of fans, with his new blond hair and cute smile. 

MBC's new year special 'Idol Athletics Championships will air this 24th.