An unexpected moment during a recent live stream has fans talking after an SM Entertainment idol accidentally let a small curse slip.

NCT WISH‘s Yushi was chatting with fans during a broadcast alongside fellow member Riku when the moment happened. While reacting playfully to Riku during the stream, Yushi used the term “kuso,” a casual Japanese expression often used like “damn” or “sh*t.”

The unexpected comment immediately caught fans’ attention, especially since idols typically try to avoid even mild swearing during broadcasts. Even Riku was shocked. Riku immediately jokingly scolded Yushi, telling him not to use such words.

🐈 네에🐈‍⬛ 나니!🐈 ㅋㅋ쿠소가🐈‍⬛ !!! 😂 그런 말 쓰지마 ㅡㅡ+🐈 빨리~🐈‍⬛ 나니!🐈 아소뽀♡ (놀자♡)

우시리쿠 진짜 웃기는애들이네 pic.twitter.com/adCm8IxmqJ

— 띠 (@galaxyushi) March 7, 2026

Riku: “What?”

Yushi: “Kuso.”

Riku: “What? Don’t use such words.”

Yushi: “Hurry up.”

Riku: “What?”

Riku: “Hang out with me.”

However, rather than causing controversy, the moment quickly went viral for a completely different reason: fans found it adorable.

yushi so cute switching personalities i kinda want to bite him https://t.co/Cbc7gDOirw

— ❤︎⁠ (@sionberrycake) March 7, 2026

wtf yushi cursing in his tiny voice i’m hard 😭😭😭😭 https://t.co/5CEcOWCBxy

— Baba!! (@jaeheebob) March 7, 2026

Instead of criticism, the clip quickly spread online with comments praising Yushi’s cute personality and the chemistry between the two members.