A different charm from going solo: the voices D.O. has met

Goodbye Summer appeared on f(x)’s second studio album Pink Tape in 2013. With D.O. of EXO-K featuring alongside the voices of Amber, Luna and Krystal, it is a collaboration from before D.O.’s solo albums came out. The freshness that recalls a first love in school days is the reason we chose this song. Rather than a song he carries alone, pay attention to a voice placed among several vocalists. Move on to the duet with Yoo Young-jin next and you see how the impression changes with the collaborator.

A track from Lee Young-ji’s 16 Fantasy, released on June 21, 2024, with D.O. featuring. The lyrics are by Lee Young-ji, the music by PEEJAY and Lee Young-ji, and the arrangement by PEEJAY. Lee Young-ji’s official introduction says the song began from imagining what it would be like to be, just once, a small person when in love. Listen to a story about how you see yourself and the feeling of being loved, in the combination of two voices. It is a case of D.O., who welcomed guests on his solo tracks, stepping inside another artist’s song.

Tell Me (What Is Love) is a joint vocal track by Yoo Young-jin and D.O., released in 2016. Yoo Young-jin wrote, composed and arranged it. Dealing with the questions and the pain left after a love ends, it offers a texture of R&B different from his plain, guitar-centered solo songs. Give some time to the voices the two exchange over the roughly 4-minute-42-second recording. That the co-vocalist made the song himself is interesting too. Listen while thinking about how the title, asked as if speaking, connects to the feelings after a breakup.

I’m Gonna Love You is the song with Wonstein from his first mini album Empathy. Where D.O. was the featured singer on Small girl before it, this time he invited another artist onto his own album. Even within the same kind of collaboration, there is fun in switching who holds the center of the song. Look at the flow of two voices connecting over the medium tempo and the rhythm of the guitar. Unlike listening to Empathy from the start, here the encounter created by the feature is at the heart of the listening.

PENOMECO features on the 2025 single DUMB. It is a meeting with an artist who had already taken part in writing the lyrics for Fit on BLISS, so you can trace a working relationship that continues across different songs. This time the collaboration is met not as a name behind the credits but as a voice heard alongside his. The recording is a short one at roughly 2 minutes 9 seconds, so after listening to the end you can widen your interest to Fit and Guitarist. Place it next to Small girl or the Wonstein collaboration and the differences made by each featured singer’s personality become clear as well.

A duet remake by Na Yoon-kwon and D.O., released on November 7, 2025. The two sang Na Yoon-kwon’s 2004 song together, with Kang Hwa-sung’s arrangement added to the song written by Kim Hyung-suk. The point to listen for is how the feeling of having no choice but to watch the one you love is shared between the original singer and a vocalist of a different generation. If you have come from songs centered on short features, this time spend roughly 4 minutes 38 seconds staying with the emotion of a ballad. It is a place to meet a familiar song again in a new pairing.

The 2025 recording from the show musical Dream High OST shows a combination bigger than a duet between two people. Suzy, D.O. and Jeong Dong-won (JD1), joined by featured artists Lim Se-jun and Yoon Seo-bin, share a single song. In this recording of Park Jin-young’s song newly arranged by Ko Young-hwan, you can meet the feeling of many people singing the same dream. After one person’s confession and a conversation between two, it closes with many heading in the same direction. Listen to the vocal recording as released at the time, and think about how the encouragement in the song stays with you.