There has been speculation about Yoo Jae-suk and Lee Hyori reuniting with Rain as 'SSAK3'. In a video released on the YouTube channel 'Pinggego' on the 25th, Lee Hyori and her husband Lee Sang-soon appeared together with the couple Hong Hyun-hee and Jay-sun, sharing various stories.

In the video, Yoo Jae-suk emphasized that Lee Sang-soon was an excellent guitarist and composer even before marrying Lee Hyori. He said, "When we were doing SSAK3, there was a process where composers sent us music blindly, and we picked songs by listening. Among several songs, we finally chose 'Again Here by the Seaside.' Lee Hyori asked, 'Do you like this?'" It seemed Lee Hyori doubted Yoo Jae-suk's reaction.

'Again Here by the Seaside' is a song composed by Lee Sang-soon. Lee Hyori mentioned that Yoo Jae-suk had an awkward reaction to choosing her husband's song at the time, explaining, "His mouth twisted a little as he said, 'Do you like this?' I was worried he might just be humoring me." Yoo Jae-suk added, "(Hyori) didn't say whether she liked it or not," and said, "I thought the song was really good, and later I understood why."

Lee Hyori said, "It's good if I do well, but isn't it better if my husband does well?" and asked Lee Sang-soon, "Is this your number one copyrighted song?" Lee Sang-soon responded positively, saying, "I was surprised too. I never imagined it would happen." Hong Hyun-hee remarked, "It was loved by the entire nation," and Lee Hyori said, "Since it was a minor song, it was amazing to see it become a song loved by the whole public."

Yoo Jae-suk emphasized, "When you think of representative summer songs, 'Again Here by the Seaside' always comes to mind in summer." Lee Hyori asked, "Won't SSAK3 reunite once more?" and Jay-sun expressed anticipation for a winter song, asking, "Isn't there a winter season song?" Yoo Jae-suk said, "I was actually going to talk about that."

Lee Hyori said, "I want to see Ji-hoon too. It's been a long time since I last saw him," and Hong Hyun-hee requested, "It would be great if you could make a winter song." Yoo Jae-suk said, "Not just because Hyori mentioned it, I was also thinking about asking her. I should talk to Ji-hoon too." Lee Hyori made everyone laugh by saying to Lee Sang-soon, "Listen for the bell sound and get ready, oppa." Jay-sun expressed excitement, saying, "Isn't a national carol coming out?"

'SSAK3,' featuring Lee Hyori, Yoo Jae-suk, and Rain, was formed through MBC's 'How Do You Play?' in 2020 and received great love. They each created alter egos Linda G and Biryong and released songs like 'In the Summer' and 'Again Here by the Seaside,' sparking a nationwide sensation.