A guest slot turns into a fan letter
Actress Lee Sun Bin used a guest appearance on Wendy's radio show on 21 October to do something plenty of listeners do every week: explain, at length, why one song has taken over her working life. According to Koreaboo's reporting, the segment turned to favourite music and Lee recommended Doyoung's 'Beginning', describing herself as such a committed listener that she has attended one of his concerts in person.
The clip circulated quickly, and it is easy to see why. This was not a polite name-check in passing. Lee described a song woven into her routine — playing during script practice, sitting on her Instagram profile, tied to a very specific feeling she reaches for when she sits down to work. For a radio show built around guests sharing the music they actually live with, it was close to a perfect segment.
The detail that travelled furthest was her answer to a hypothetical. Asked by Wendy what she would do if Doyoung's side ever got in touch about appearing in a music video, Lee treated it as an appointment she had already accepted, saying in effect that she had cleared her schedule and was simply waiting to hear when. Koreaboo notes that Lee has been publicly dating actor Lee Kwang Soo since 2018; the enthusiastic answer here is fandom, not a story about her private life.
'Beginning' as a working soundtrack
The most concrete part of the anecdote is also the most relatable. Lee said she has played 'Beginning' on repeat while practising scripts, particularly for scenes that are soft and loving. That is a specific, practical piece of testimony about how a song gets used rather than simply admired: not as background noise, but as a tool for finding a register.
Actors talk about this more often than idol fandoms sometimes realise. A repeated track can function as a mood anchor — something that sets the emotional temperature before a take, or keeps it steady across a long rehearsal. Lee's description of looping one song while working on tender scenes fits that pattern, and it explains why the recommendation landed differently from a standard 'this is a great song' answer on a radio show.
It also places the emphasis where fans of Doyoung's solo work would want it: on the song's usefulness to a listener outside the idol ecosystem. Lee is not framing 'Beginning' as a collector's item or a chart talking point. She is describing an intimate, slightly obsessive listening habit — the kind that turns a track into a personal default.
A song in the profile, and a youth-drama feeling
Two further details round out the picture. Lee said the song makes her feel like the lead character in a youth drama, and Koreaboo reports that it currently serves as the background music on her Instagram profile. Both are small things that say a lot about how music circulates now.
Profile music is a public-facing choice, however casual. It signals to anyone who taps through what a person is listening to at that moment, and it turns a private repeat-play habit into something visible. For an actress with a substantial following, that is a mild but real endorsement — the sort of soft recommendation that does not require a press release to travel.
The youth-drama comparison is the more revealing line. It suggests the song works for Lee as atmosphere and narrative, which is consistent with the way she says she uses it while preparing scenes. Listeners do this constantly: soundtrack a walk, a commute, a piece of work, and borrow the mood a song supplies. Her description simply makes the mechanism explicit.
Wendy as host, and the SM connection
The setting matters too. Wendy, of Red Velvet, was hosting, and the show's format gave Lee room to expand on a single recommendation rather than list ten. That space is what turned a passing compliment into a story with legs.
There is also a natural label adjacency here. Wendy's group and Doyoung's share a company lineage, which does not make the exchange staged — it simply explains why a guest on that particular show might reach for that particular artist when asked about favourite music. The conversation reads as an easy one between people operating in overlapping worlds.
Radio remains one of the better formats for this kind of disclosure. A guest has time to explain, the host can push with a follow-up, and the result is more textured than a red-carpet soundbite. Whether the show's full segment gets clipped and subtitled for international listeners, as so often happens now, is a separate question; what aired in Korean on 21 October was enough to start the conversation.
The music video answer and the limits of a joke
Lee's response to Wendy's hypothetical is the line that will be quoted most. It is funny because it inverts the usual polite demurral: instead of saying she would be flattered to be asked, she implied the only missing piece was a phone call, and that her diary was already empty in anticipation.
It should be read as the joke and the wish it plainly is. Nothing in the reporting suggests a music video offer exists, and Lee's answer was a reaction to a hypothesis Wendy put to her, not an announcement. Fans have been enjoying it precisely because it is the kind of overeager line that only works in a live studio.
That framing is worth keeping. Read literally, the exchange could be inflated into a story about a collaboration in the works; read properly, it is a guest being game and quick on air, which is a big part of why the clip is fun. The reporting is clear about what was said and what prompted it, and the rest is audience imagination — best left where it started.
Why these small moments travel
Fan accounts circulated the segment quickly, and the reason is not hard to identify. A well-known actress describing an idol's song as central to her working routine is a version of the testimony fans give each other constantly, elevated by a public platform. It validates the habit rather than merely reporting it.
There is a practical benefit for the artist too, without overstating it. A recommendation from a prominent actor on a music-focused radio show gives a track a second life among listeners who might not follow idol releases closely. That sort of organic mention is hard to manufacture and easy to notice when it happens.
It is also a reminder that idol solo work lives partly in these everyday uses — repeat plays during script practice, a profile soundtrack, a concert ticket bought without fanfare. Chart positions and headline numbers tell one story; a guest on a radio show describing how she actually listens tells another, and for many readers it is the more persuasive one.
The takeaway
The news here is small and neatly contained: on 21 October, Lee Sun Bin told Wendy's radio show that Doyoung's 'Beginning' is her repeated working companion, that it sits on her Instagram profile, and that she has seen him perform live. She also made a joke about being available for a music video that should be enjoyed as a joke.
The reason it lands is that the specifics are so ordinary. A song looped during rehearsal, a mood borrowed from a track before a tender scene, a profile page used to broadcast a favourite. Those details are more interesting than a headline about a celebrity crush, because they describe what music is for.
If you have a track you keep returning to while working, the question is worth taking seriously for a moment — the discussion prompt below asks exactly that, and reader answers tend to be more varied than any playlist.
