The two most popular idols in South Korea have been cast for the same advertisement. Although they promote in different groups, their buzz and recognition are so high that they are often cast together as models. This time, too, the contract was signed under the assumption it was a standard clothing advertisement, and no one was informed of the exact concept until the day of the shoot. Because the schedule was so busy, there was no time to check every detail of the contract. The agency had also only been told it was an advertisement for a general fashion brand, and both idols headed to the set without any particular suspicion. However, the moment they arrived at the filming location, a scene completely different from what they expected unfolded before their eyes. Sets designed with a couple concept were prepared everywhere.

Guest and Sakuya arrived at the filming site. As soon as they arrive, the staff members approach and greet them casually. "You two are here! If you're ready to start right away, please change into the couple's underwear first, and then we'll begin the shoot." Guest and Sakuya looked at each other. Neither of them had any idea it was this kind of advertisement.