Who Is ONCE? A Beginner's Guide to TWICE's Fandom
Published:
- Category: Fandom guide
- Artist: TWICE
KPOP NO1 Editorial · Sources checked November 6, 2026
For the past two years, TWICE have wished their fans a happy birthday in early November. On November 3, 2026 (Korean time), the group's official YouTube channel posted a short clip titled "HAPPY 11th BIRTHDAY ONCE!" under the hashtag #HappyONCEday. A year earlier, on November 3, 2025, it posted "To. ONCE" with #ONCE_10TH_BIRTHDAY.
ONCE is the name of TWICE's official fandom. This guide covers where the name sits in TWICE's own story, the albums the group has dedicated to ONCE, the Candy Bong, the cheering guides and the fan meetings. It also says what to check before you join the official fan club. Official TWICE and JYP channels come first. Where only the press has recorded part of the story, we link the report.
Start with the name: ONCE and TWICE
TWICE debuted in October 2015 with "Like OOH-AHH." The Korea Herald The fandom's yearly birthday clips count from that first year: the 10th came in 2025, the 11th in 2026.
The two names are built to go together, and TWICE have used that in their own titles. Their third studio album, released on November 12, 2021, is called Formula of Love: O+T=<3. JYP said the title shows the relationship between TWICE and ONCE as a simple math equation, using the initials of the fandom and the group plus a love emoticon. Yonhap via The Korea Herald
We didn't find a JYP or fan club text that explains what the name ONCE means or where it came from, so we don't offer an explanation here.
The official channel's hashtags make the same pairing. The videos made for the Formula of Love release carry #ONCEcomesbeforeTWICE.
The official fan club, generation by generation
The paid fan club is also called ONCE, and it recruits in generations. The official channel announced the first one in March 2017: "ONCE 1st Generation Recruitment" went up on March 19, 2017 (Korean time), with a link to TWICE's page on JYP's fan site.
Official video · TWICE / YouTube
Watch the original on YouTube ↗The club is now in its fifth generation. The official channel marked it with a short clip tagged #ONCE_5TH_GENERATION on April 17, 2025. The latest recruitment was in April 2025, and fifth-generation membership was the entry requirement for the 2026 anniversary event described below. The Korea Herald
Albums and videos made for ONCE
TWICE have made whole releases around their fans. Before Formula of Love came out, the official channel posted two videos addressed to the fandom. To ONCE From TWICE went up on October 18, 2021 (Korean time), and Present For ONCE followed on October 21.
Official video · TWICE / YouTube
Watch the original on YouTube ↗For the fifth anniversary in 2020, the channel posted ONCE WITH TWICE and the 22-minute ONCE upon a TWICE, 5 Years. Both are in the table at the end.
The 10th anniversary brought the clearest example. TEN: The Story Goes On, released on October 10, 2025, is a tribute to ONCE, the fandom that has supported TWICE for a decade, as JYP put it. The lead single "ME+YOU" is an R&B pop track. Its lyrics express TWICE's promise of eternal friendship to each other and to ONCE, and the members contributed ideas for them. Yonhap via The Korea Times The Korea Herald described the song as being about the lasting friendship and connection between TWICE and its fans. Our TWICE starter guide has more on the album.

Archival photo: fans cheering at a TWICE concert in Japan, March 2019, with light sticks raised. Credit: Soolemi, Wikimedia Commons, CC BY-SA 4.0. Linked from Wikimedia Commons at a smaller size; no other edits by KPOP NO.1.
What the members say about ONCE
The clearest recent words came from Jeongyeon. In August 2026, she announced that she was leaving JYP after 11 years and joining a new agency, while staying in TWICE. In a handwritten note, she said her members and ONCE gave her the courage to take the next step. "Being there for Once as a member of Twice will always come first," she wrote. The Korea Herald
Nayeon spoke for the group when Formula of Love came out. She said she hoped listeners would get a bit of strength and energy from TWICE's music. Yonhap via The Korea Herald
The official light stick: Candy Bong
TWICE's official light stick is called the Candy Bong. ("Bong" is Korean for stick.) The Korea Herald's guide to K-pop light sticks lists it next to other well-known ones. The Korea Herald on K-pop light sticks, November 2025 You'll see it in fan photos from TWICE's concerts, like the one above.
We didn't find an official JYP page that lists the current Candy Bong versions or explains how they pair at a show. Those rules are set event by event, so read the official notice for your concert before you go.
We also didn't find an official text naming ONCE's fandom colors, so we don't list any here.
Cheering guides: ONCE & TWICE
TWICE post official Cheering Guide videos for their songs. The members show where fans chant along, so ONCE become part of the performance. The 2019 guide for "Feel Special" is titled ONCE & TWICE "Feel Special" Cheering Guide. It went up on October 1, 2019 (Korean time).
Official video · TWICE / YouTube
Watch the original on YouTube ↗The series has continued with later title tracks. The guide for "ME+YOU" went up on October 10, 2025, the album's release day.
Official video · TWICE / YouTube
Watch the original on YouTube ↗More recent ones, including "THIS IS FOR," are in the table at the end.
Our take: if you're going to your first TWICE show, watch the guide for the newest title track first. It's the song you're most likely to chant along to.
Anniversary fan meetings
TWICE meet ONCE around their debut anniversary in October. The official channel's behind-the-scenes videos give the recent titles:
- 2023 TWICE FANMEETING "ONCE AGAIN" (8th anniversary), behind video November 10, 2023
- 2024 TWICE FANMEETING [HOME 9ROUND] (9th anniversary), behind video November 19, 2024
- 2025 TWICE FANMEETING [10VE UNIVERSE] (10th anniversary), behind video November 21, 2025
The 8th and 9th anniversary events were held at Olympic Hall in Seoul. The 10th, on October 18, 2025, moved to Korea University's Hwajeong Gymnasium and sold out in the fan club presale. The Korea Herald
For the 11th anniversary, JYP planned a smaller fan party. Once Upon A Thrill was scheduled in Seoul for October 17, 2026, in three sessions of 250 people each, 750 in all. Places were drawn by lottery and limited to fifth-generation fan club members aged 15 and older, and the venue was shared only with those selected. The Korea Herald reported that many fans criticized the small capacity, given the scale of TWICE's tours: the sixth world tour, This Is For, played 81 shows across 44 cities and regions.
The most recent behind video is below.
Official video · TWICE / YouTube
Watch the original on YouTube ↗Official membership: where to look
Anyone who loves TWICE can call themselves ONCE. The official fan club is a separate, paid membership that recruits by generation. TWICE's video descriptions link to the group's page on JYP FANS, JYP Entertainment's fan platform. That's where membership notices are posted.
FANS notices are only visible to people who join the community there, so we couldn't check the current membership terms for this guide. Before you join, read the latest recruitment notice on FANS. Before any event, read that event's notice too. As the 2026 fan party showed, eligibility can depend on your generation and age. We don't list prices, because they change.
Official videos about TWICE and ONCE
Dates are the YouTube publication dates in Korean time. Every video is on TWICE's official channel.
| Type | Official video | Published, KST |
|---|---|---|
| Fan club | ONCE 1st Generation Recruitment | March 19, 2017 |
| Cheering guide | ONCE & TWICE "Feel Special" | October 1, 2019 |
| Anniversary | TWICE 5th Anniversary "ONCE WITH TWICE" | October 4, 2020 |
| Anniversary | ONCE upon a TWICE, 5 Years | October 9, 2020 |
| Video | To ONCE From TWICE | October 18, 2021 |
| Video | Present For ONCE | October 21, 2021 |
| Fan meeting | 2023 FANMEETING "ONCE AGAIN" Behind | November 10, 2023 |
| Fan meeting | 2024 FANMEETING [HOME 9ROUND] Behind | November 19, 2024 |
| Fan club | #ONCE_5TH_GENERATION | April 17, 2025 |
| Cheering guide | "THIS IS FOR" | July 11, 2025 |
| Cheering guide | "ME+YOU" | October 10, 2025 |
| Birthday | To. ONCE (#ONCE_10TH_BIRTHDAY) | November 3, 2025 |
| Fan meeting | 2025 FANMEETING [10VE UNIVERSE] Behind | November 21, 2025 |
| Character | TWICE New Character 'TDOONGZ' | October 8, 2026 |
| Birthday | HAPPY 11th BIRTHDAY ONCE | November 3, 2026 |
Keep exploring
New to the group itself? The TWICE starter guide introduces the nine members and where to start listening.
Want the music? Our album guides cover FANCY YOU and THIS IS FOR.
The TWICE artist page collects every guide and news story about the group.
Sources
- TWICE official YouTube channel (videos listed above)
- Yonhap via The Korea Herald, "TWICE to drop third studio album," November 12, 2021
- The Korea Herald, "Ten years in, Twice's story still 'goes on'," October 10, 2025
- Yonhap via The Korea Times, "TWICE to drop special album marking 10th anniversary," October 10, 2025
- The Korea Herald, "Identity, unity and pride: Everything in a K-pop light stick," November 25, 2025
- The Korea Herald, "Twice's Jeongyeon leaves JYP after 11 years, joins Varo Entertainment," August 10, 2026
- The Korea Herald, "Twice fans question scale, access of 11th anniversary event," October 7, 2026