Kdrama Sparks Viral S-Line Trend Featuring Red Lines Over People

A mysterious wave of red lines is connecting people across social media, sparking both laughter and controversy. The “S-Line trend,” inspired by South Korea’s provocative new drama S Line, has users drawing crimson threads over their heads to symbolize intimate connections—igniting 2.7 billion hashtag views on TikTok alone.

What Is the S-Line Trend?

The S-Line trend involves users posting photos with red lines drawn from their heads to others, representing real or imagined sexual relationships. It exploded after Filipino actress Toni Fowler shared an image on July 18, 2025, featuring red lines connecting her to partners Vince Flores and Aron Manalo—both fathers of her children—with the caption “Dalawang naanakan ako” (“I have two children”).

Within hours, the trend mutated into creative chaos:

• A veterinarian posted cats linked by red lines, joking about neutered pets
• K-pop fans photoshopped “lines” between idols
• Thousands adapted the meme for romantic crushes or humorous platonic bonds

As sociologist Dr. Elena Reyes from Manila University notes: “It reflects Gen Z’s fascination with visualizing intimacy in digital spaces—but blurs boundaries between private lives and public performance.”

The Kdrama Origin: S Line

The trend draws directly from the Korean thriller S Line, streaming on Wavve since July 2025. The show centers on Lee Gyu Jin (Lee Da Hee), a woman who sees crimson threads—”S-Lines”—connecting people who’ve had sexual encounters. Chaos ensue when glasses allowing others to see these lines emerge, exposing hidden relationships in conservative Korean society.

Key elements driving the trend:

• Symbolism: Red lines = invisible sexual bonds
• Mystery Plot: Gyu Jin and detective Han Ji Uk (Lee Soo Hyuk) hunt the glasses’ creator
• Webtoon Roots: Based on Little Bee’s popular S Line comic

With a 7.8/10 rating on MyDramaList, the show’s final episodes air July 25, 2025.

Cultural Impact and Risks

While playful for many, the trend raises concerns:

• Privacy Issues: Filipino netizen @princecprxn warned: “It encourages judging others’ sexual histories.”
• Consent Debates: Uploading others’ photos with implied “lines” risks harassment
• Regional Sensitivities: Conservative communities criticize public sexual references

The Korean Film Council has noted a 40% surge in webtoon adaptations since 2024, highlighting how quickly fictional concepts leap into global digital culture.

How to Responsibly Navigate the Trend

1. Avoid Sharing Others’ Photos: Use only your own images
2. Contextualize: Clarify jokes to prevent misunderstandings
3. Explore Safely: Join discussions via fan forums like r/Kdrama

Must Know

What does “S-Line” mean in the trend?
The “S” stands for “sexual” or “soul,” referencing red threads symbolizing intimate connections between people. Originating from the Kdrama S Line, these lines visualize hidden relationships. The trend uses this metaphor humorously on social media.

Is the S-Line trend harmful?
Potentially. While many participate lightheartedly, linking others without consent can enable bullying or misinformation. Experts advise avoiding identifiable photos of strangers and respecting privacy boundaries when joining viral challenges.

Where can I watch the original S Line Kdrama?
All episodes stream exclusively on Wavve, Korea’s major drama platform. International viewers need a VPN. The thriller blends mystery and social commentary across six 50-minute episodes, concluding July 25, 2025.

Why did Toni Fowler’s post go viral?
Fowler’s candid post—showing lines to her children’s fathers—resonated due to its unflinching honesty about complex relationships. It exemplified how the trend could spark conversations about modern family structures.

As the S-Line trend blurs digital play with real-world implications, it underscores social media’s power to transform fiction into global phenomena overnight. While creativity thrives, remember: behind every red line is a human story deserving respect. Join the conversation mindfully, and experience the original drama S Line on Wavve to grasp the cultural moment firsthand.