HYBE’s new boy group CORTIS has turned their debut era into a TikTok masterclass—smart challenges, cross-label collabs, and choreography built for the For You Page. According to Kpopping, they even hit 1M followers within six days of debut, positioning them as one of the fastest-rising 5th-gen acts on the app.

Who is CORTIS (quick primer)

CORTIS (Martin, James, Juhoon, Seonghyeon, Keonho) debuted under BIGHIT MUSIC on Aug 18, 2025 after pre-releasing “GO!” a week earlier. The name is drawn from “COLOR OUTSIDE THE LINES,” signaling a creative, self-driven identity.

The Top 5 Most-Watched CORTIS TikToks

1) “GO” Dance Challenge — 15.2M views

The group’s own “GO” challenge sits atop their feed: razor-clean formations, tight musical accents, and a hook that reads instantly on mobile. Fans also fixated on leader Martin’s 6'3" frame anchoring the center lines—great visual contrast that pops in a three-second loop. (15.2M views; 2.5M likes, 13.9k comments, 190.9k saves.)

2) Bow to a Senior: J-Hope React — 11.7M views

CORTIS posted a respectful reaction to BTS’s J-Hope doing the “GO” challenge—complete with a bow and a grateful caption. It’s textbook fandom architecture: social proof + lineage + humility, and audiences responded in kind (11.7M views; 2.5M likes; 23k comments; 138.9k saves).

3) With Bada Lee — 11.2M views

Bringing in superstar choreographer Bada Lee signals credibility to the dance community. The clip works because it keeps the camera close on footwork and chest hits—micro-details that TikTok’s algorithm loves.

4) HYBE Synergy: KATSEYE’s Megan & Daniela — 7.7M views

Cross-group chemistry sells the “What You Want” moves as more than a one-off trend. The playful partner work makes the routine easy to duet, multiplying remix potential across fandoms.

5) LE SSERAFIM (Chaewon, Kazuha, Eunchae) — 7.4M views

A polished three-on-three collab that highlights line matching and timing—especially Eunchae’s synchronization—while nudging both fandoms to share, stitch, and rank their bias pairings.

Why these clips work (and what they tell us about CORTIS)

• Choreo engineered for the scroll: Short, repeatable counts with a defined “money shot” per 1–2 bars—perfect for loops and duets.
• Status handshakes: Featuring J-Hope, Bada Lee, KATSEYE, and LE SSERAFIM builds trust with dance fans and K-pop multi-stans—credibility by association.
• Clear group story: The “outside the lines” ethos shows up in the feed: self-aware captions, clean framing, and leader-centered blocking that spotlights member contrasts.