SM Entertainment's newest girl group isn't a rookie anymore in any way that matters — and their new summer single just proved it.
Here's your complete introduction to Hearts2Hearts and "Lemon Tang."
Hearts2Hearts is an 8-member SM Entertainment girl group that debuted in February 2025. Their second mini album, "Lemon Tang," released June 22, 2026, and the title track hit No. 1 on M Countdown shortly after. Written by SM veteran KENZIE, "Lemon Tang" follows the viral success of February's "RUDE!," which reached No. 57 on the Billboard Global 200. If you missed their debut year entirely, this is a good moment to catch up — they're past the "promising rookie" phase and into "proven hitmaker."
Hearts2Hearts — "Lemon Tang" Official MV (2026) · SM Entertainment · via YouTube
Who Is Hearts2Hearts?
Hearts2Hearts is an eight-member girl group under SM Entertainment: Jiwoo (leader), Carmen, Yuha, Stella, Juun, A-na, Ian, and Ye-on. They debuted on February 24, 2025 with the single "The Chase," and were positioned from the start as SM's answer to a very specific question — what does a modern version of the label's own Girls' Generation and f(x) legacy look like. That comparison isn't fan speculation; it's one the group's own agency has leaned into publicly.
Hearts2Hearts
8 Members · SM Entertainment · Debuted Feb 2025Members: Jiwoo (leader), Carmen, Yuha, Stella, Juun, A-na, Ian, Ye-on
- Deliberately structured around no single "center" — vocal lines, choreography, and camera time are spread evenly across all eight members
- Sold out showcases in New York and Los Angeles in March 2026, less than 13 months after debut
- "RUDE!" (Feb 2026) peaked at No. 57 on the Billboard Global 200 and No. 5 on Billboard Korea Hot 100
- Member Stella's spoken English part in "RUDE!" became a viral fan-challenge moment
What consistently gets pointed out by critics and fans alike is that Hearts2Hearts' appeal doesn't come from one breakout member carrying the group — it's cumulative. That's a harder thing to engineer than it sounds, and it's a big part of why the group has held onto momentum through three straight singles rather than fading after one viral moment.
What's on "Lemon Tang"
"Lemon Tang" is Hearts2Hearts' second mini album, released June 22, 2026, at a media showcase at Blue Square in Seoul. The six-track project is built around the title track of the same name — a bright, upbeat dance-pop song written by KENZIE, the longtime SM in-house songwriter behind hits going back to Girls' Generation's "Into the New World." Where "RUDE!" leaned on a team of Western songwriters for its house-driven sound, "Lemon Tang" pulls from SM's own in-house songwriting legacy instead.
Hearts2Hearts — "RUDE!" Official MV (2026), the group's breakout viral single ahead of "Lemon Tang" · SM Entertainment · via YouTube
The song's concept plays on pairing something sour (lemon) with something sweet — the idea that a sharp, sour flavor turns into something more enjoyable once it's combined with something else, which the group has described as a metaphor for relationships and connection rather than a literal food pun. The mini album's tracklist also includes "15-LOVE," "처음투성이 (Baby Steps)," "heart emoji (♡)," and additional tracks rounding out a bright, feel-good summer sound. The title track topped Mnet's "M Countdown" on July 2, giving the group its first No. 1 win on a major weekly music show.
The "Lemon Tang" vs. aespa's "LEMONADE" Coincidence
If the citrus theme sounds familiar, that's not your imagination — SM labelmates aespa released their own comeback single "LEMONADE" just a month earlier, in May 2026. Both groups leaning into a lemon concept within weeks of each other sparked some online chatter, and Hearts2Hearts leader Jiwoo addressed it directly in interviews, saying she'd already talked it over with aespa's Karina after the two ran into each other filming a challenge video. According to Jiwoo, the overlap was coincidental rather than planned, and the two songs land in different emotional spaces: "LEMONADE" leans into a cooler, more electric kind of sourness, while "Lemon Tang" is about how things turn sweet once you're sharing them with someone else.
How We Got Here: The Discography So Far
| Release | Type | Date | Notable For |
|---|---|---|---|
| The Chase | Debut single | Feb 2025 | Introduced the group's concept and eight-member lineup |
| STYLE / FOCUS | Singles | 2025 | Built the group's early catalog and fandom base |
| RUDE! | 3rd digital single | Feb 2026 | Viral breakout — No. 57 Billboard Global 200 |
| Lemon Tang | 2nd mini album | June 2026 | First No. 1 on M Countdown |
Hearts2Hearts — "The Chase" Official MV (2025), the group's debut single · SM Entertainment · via YouTube
If you want to understand why fans keep comparing Hearts2Hearts to Girls' Generation and f(x), start with "The Chase" and listen through to "Lemon Tang" back to back — the shift from a moodier debut concept to this bright, KENZIE-penned summer sound mirrors exactly the kind of concept range SM's earlier girl groups were known for.
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