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One's youth is like twinkling watermelons. It is just there to shine.


A CODA (child of deaf adult) student born with a gift for music crash lands at an unfamiliar place after time traveling through a suspicious music shop. There, he forms the band Watermelon Sugar with other mysterious youths.

  1. Jin Soo-wan


  2. Son Jeong-hyeon


Series Cast

  1. Ryeoun as Ha Eun-gyeol


    Ha Eun-gyeol

    16 Episodes

  2. Choi Hyun-wook as Ha Yi-chan

    Choi Hyun-wook

    Ha Yi-chan

    16 Episodes

  3. Seol In-a as Choi Se-gyeong / On Eun-yu

    Seol In-a

    Choi Se-gyeong / On Eun-yu

    16 Episodes

  4. Shin Eun-soo as Yoon Chung-ah

    Shin Eun-soo

    Yoon Chung-ah

    16 Episodes

  5. Choi Won-young as Eun-gyeol's Father

    Choi Won-young

    Eun-gyeol's Father

    16 Episodes

  6. Seo Young-hee as Eun-gyeol's Mother

    Seo Young-hee

    Eun-gyeol's Mother

    16 Episodes

  7. Jung Sang-hoon as Master

    Jung Sang-hoon


    16 Episodes

  8. Cheon Ho-jin as Grandpa Viva

    Cheon Ho-jin

    Grandpa Viva

    16 Episodes

  9. Goh Doo-shim as Go Yang-hee

    Goh Doo-shim

    Go Yang-hee

    16 Episodes

  10. View More

Full Cast & Crew

Current Season

Season 1

2023 • 16 Episodes

Eun-gyeol, a seemingly ordinary high school student, leads a clandestine double life. By day, he is a model student, but by night, he becomes a guitarist for a band in Hongdae. Unexpectedly, he travels back in time. Together, they form a band called 'Watermelon Sugar' and forge a deep bond. Along the way, Eun-gyeol encounters an enigmatic girl and falls in love. This tale intertwines elements of coming-of-age, fairytales, and magic, creating a captivating story of growth and self-discovery.

Tomorrow is your only chance to go back.

(1x16, November 14, 2023) Season Finale

View All Seasons

Twinkling Watermelon
Twinkling Watermelon


Original Name 반짝이는 워터멜론

Status Ended


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Type Scripted

Original Language Korean


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