Seoul Trip Diary: Three Sisters from Japan Record Hearts2Hearts' "STYLE"
On their Seoul Trip, three sisters from Japan stepped into a real K-pop booth and recorded Hearts2Hearts' "STYLE" the way idols do — one song, parts split between them, mixed and mastered into a finished track.
What is it like to record a K-pop song in Seoul as a family?
If your family shares one K-pop group, a KING STUDIO session turns that shared playlist into something you take home as a finished track. On a recent Seoul Trip, three sisters from Japan — Kyo, Ryo, and Tomo — booked the DIAMOND experience and recorded Hearts2Hearts' "STYLE," dividing the song into parts the way the eight members of the group do. For S2U fans planning a Seoul Trip, this is what a real studio day actually looks like — not a tour-bus photo stop, but two hours behind the glass.
- Why "STYLE"? Three sisters, one song split eight ways
- Inside the booth: recording "STYLE" idol-style
- KING STUDIO services: which one fits your Seoul Trip? (FAQ)
Why "STYLE"? Three sisters, one song split eight ways
For sisters who already love K-pop, the appeal of Hearts2Hearts' "STYLE" was simple: it's a song built for more than one voice. Released by SM Entertainment in June 2025 as the group's first comeback single, "STYLE" is an up-tempo dance track with a bright, bouncy hook and rap sections traded between members — which makes it a natural fit for a group of siblings who wanted to each own a piece of the song rather than sing in unison.
That was the real challenge they set themselves. Instead of all three singing the same melody, they did what Hearts2Hearts' eight members do on the actual record: they divided "STYLE" into parts, assigning lines and sections to each sister so the finished track would sound like a group performance, not a sing-along. Kyo and Ryo, who train in K-pop vocals back in Japan, took the parts that anchor the song; Tomo, the youngest at seven, claimed her own section and committed to it.
For a fan family, picking a song you can split is the whole point — it turns "we all like this group" into three distinct vocal takes that get comped together into one master. That decision, made before anyone stepped into the booth, is what shaped the entire session. It's also the part most worth thinking through before you book: a song with clearly separated parts gives a group the most idol-like result. (Want to see how the full process works start to finish? Here's the complete KING STUDIO recording guide.)
Inside the booth: recording "STYLE" idol-style
Here's how the DIAMOND session unfolded, step by step — the same workflow a real K-pop act follows, scaled for three young first-time recording artists.
Step 1 Meeting the team & the room
The session began with the KING STUDIO crew — vocal director, recording engineer, and producer — walking the sisters through a professional control room and vocal booth: the mic, the headphones, the talkback button, and what each one does. For three fans who'd only seen this in behind-the-scenes idol content, standing on the other side of the glass was the moment it stopped being a screen and became real.
Step 2 Vocal training & warm-up
Before any recording, the sisters worked through a guided vocal warm-up with the vocal director. Because Kyo and Ryo already train in K-pop vocals in Japan, they moved through this quickly — and the director was able to push them a little further than a typical first-timer.
Step 3 Splitting the parts & setting the key
Next came the structural decision that defined the whole take: dividing "STYLE" into sections for each sister, then adjusting the backing-track key so the song sat comfortably in their voices. This is the step most people don't realize happens on real records — the instrumental is tuned to the singer, not the other way around.
Dividing Hearts2Hearts "STYLE" into parts and adjusting the backing-track key
Step 4 Recording, one sister at a time — like real idols
Each sister recorded her part separately, the way K-pop vocals are actually tracked: isolated takes, layered and comped later into one polished whole.
Ryo recorded her section, then Tomo took the booth for hers, then Kyo for the parts anchoring the song. The youngest, Tomo, was recording solo at seven years old — and stayed with her part until it was done.
Step 5 Directing from the booth
Throughout, vocal director Jiseon coached each take from the control room — timing, delivery, where to breathe, how to land the consonants. The sisters are fast learners, and they followed direction closely enough that the takes came together efficiently. (They're also strong dancers, which showed in how naturally they carried the song's rhythm.)
Step 6 Final monitoring & the finished master
With every part recorded, the sisters sat in the control room and listened back to the comped, mixed track — hearing their three separate voices assembled into one "STYLE" the way it sounds on a release. With DIAMOND, that pitch-corrected, mixed, and mastered file is theirs to take home: the actual reason this tier exists.
This is the gap between DIAMOND and a casual "sing in a booth" experience: parts split idol-style, key tuned to the singers, separate tracking, and a real ruff mix-and-master at the end. You don't leave with a phone recording — you leave with a produced track. (Pricing for each tier is on the booking page.)
A note from the sisters
Customer testimonial video — sisters from Japan after their DIAMOND session
Recording chances like this are rare for us back home, and the whole process was genuinely fun. Singing each part into the mic reminded us of the "First Take" videos on Sony Music Japan's YouTube channel — that feeling of capturing a real performance in one room. Trying a completely new way of recording was the best part.
Where S2U fans can go on a Seoul Trip
These are KING STUDIO's own suggestions for Hearts2Hearts / S2U fans planning a Seoul Trip — not places this family visited
COEX & the Starfield Library / 코엑스 & 별마당 도서관
The K-pop-adjacent district around SM's hub, a reliable fan-photo area.
📍Address (Google) : 513 Yeongdong-daero, Gangnam-gu, Seoul
📍Address (Naver) : 서울특별시 강남구 영동대로 513
KING STUDIO services: which one fits your Seoul Trip? (FAQ)
Q. What is the DIAMOND experience?
A. DIAMOND is the full recording package: you record your chosen K-pop song, the team applies pitch and timing correction, then mixes and masters it into a finished track you take home. This is where take-home produced recordings begin — and it's what these sisters booked.
Q. What about GOLD / Personal Vocal?
A. GOLD is a 90-minute one-on-one vocal analysis and coaching session — a diagnosis of your range, tone, and habits, with personalized song recommendations and a written PDF Personal Vocal report. It's coaching, not a take-home produced track; for a finished recording, that's DIAMOND.
Q. Is there an option with a music video?
A. Yes — PREMIUM includes everything in DIAMOND plus a full K-pop-style MV filmed during your session.
Q. Can a group record together, like these sisters did?
A. Yes. The K-Pop Making Class is built for groups of 2–15, taking one song and splitting it into idol-style parts — exactly the format this family used for "STYLE."
For a full breakdown of all four services in one place, see all four KING STUDIO services. Current pricing is always on the booking page.
Plan your own Seoul Trip recording session
Whether you're a solo fan or a whole family that shares one group, a KING STUDIO session turns a Seoul Trip into a finished K-pop track with your name on it.
You came for the concert. Leave with the recording.
➡️ Book your DIAMOND experience now
Which Hearts2Hearts song would YOU split with your group? S2U fans from Japan and everywhere else — tell us in the comments which track you'd record on your Seoul Trip. 💎🎤
🎙️ Book your own K-Pop session → Book your DIAMOND experience now
🌐 Visit us: https://kingstudio.co.kr/en
💎 Read more about DIAMOND : kingstudio.co.kr/blog/diamond
📍Address (Google) : B1 52, Samseong-ro 75-gil, Gangnam-gu, Seoul
📍Address (Naver) : 서울시 강남구 삼성로 75길 52 B1
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