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Lee Yool falls off a cliff and nearly dies in an attempted assassination. He loses his memory, and wanders for 100 days under a new name and personality. During this period, he meets Hong Sim, head of the first detective agency in Joseon.

  1. Lee Jong-jae


  2. So Jae-hyun


Series Cast

  1. Doh Kyung-soo as Crown Prince Lee Yool / Won-deuk

    Doh Kyung-soo

    Crown Prince Lee Yool / Won-deuk

    16 Episodes

  2. Nam Ji-hyun as Hong-sim / Yoon Yi-seo

    Nam Ji-hyun

    Hong-sim / Yoon Yi-seo

    16 Episodes

  3. Cho Seong-ha as Kim Cha-eon

    Cho Seong-ha

    Kim Cha-eon

    16 Episodes

  4. Jo Han-chul as King

    Jo Han-chul


    16 Episodes

  5. Oh Yeon-ah as Queen Park

    Oh Yeon-ah

    Queen Park

    16 Episodes

  6. Ji Min-hyuk as Prince Seo-won

    Ji Min-hyuk

    Prince Seo-won

    16 Episodes

  7. Kim Seon-ho as Jung Je-yoon

    Kim Seon-ho

    Jung Je-yoon

    16 Episodes

  8. Jung Hae-kyun as Hong-sim's Stepfather

    Jung Hae-kyun

    Hong-sim's Stepfather

    16 Episodes

  9. Han So-hee as Kim So-hye

    Han So-hee

    Kim So-hye

    16 Episodes

  10. View More

Full Cast & Crew

Last Season

Season 1

2018 • 16 Episodes

A prince is the victim of an attempted assassination. He falls off a cliff and subsequently wanders for 100 days under a new name and personality. During that time he meets the head of a prominent detective agency.

The End of War between Crown Prince and Vice-Premier

(1x16, October 30, 2018) Season Finale

View All Seasons

100 Days My Prince
100 Days My Prince


Original Name 백일의 낭군님

Status Ended


  • See more TV shows from tvN...

Type Scripted

Original Language Korean


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