Singer Seo In-guk revealed a two-shot with Jung Eun-ji.
On the afternoon of 16th, Seo In-guk posted a photo with the words 'Come to see the music video.'
The released photo shows Seo In-guk and Jung Eun-ji doing a V sign while gazing at the camera. The two create a couple atmosphere, presenting a warm appearance. Fans who saw the photo reacted with various comments such as 'It's amazing to reunite after 13 years,' 'Why do both of them not age at all?' and 'Oh, this is exciting.'
Meanwhile, the duet song 'Couple' by Jung Eun-ji and Seo In-guk is a reinterpreted song of the title track 'Couple' from the regular 3.5 album released by Sechs Kies in 1998, presented with a band sound. The arrangement involved Aaron Kim and Isaac Han, who have worked with Red Velvet and Tomorrow X Together, adding excitement by consolidating the warmth of the original song with an intro that connects to a refreshing spring atmosphere.
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