My Roommate Is a Gumiho – Cast & Summary

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My Roommate Is A Gumiho - Cast, Summary, Synopsis

A webtoon adaptation of the Korean drama, My Roommate Is a Gumiho, made its first release date from 26 May 2021.

My Roommate Is A Gumiho or also well-known as Frightening Cohabitation is starred by Hyeri as the female lead and Jang Ki Yong as the male lead.

Previously, Hyeri starred in several dramas, such as Reply 1988 (2015-2016), Two Cops (2017), and Miss Lee (2019).

Meanwhile, Jang Ki Yong had starred in some K-dramas, such as Come and Hug Me (2018), Kill It (2019), and Search: WWW (2019).

This drama took the place of the previous tvN drama, Mouse, which usually was aired every Wednesday and Thursday at 22:30 KST.


  • Title: My Roommate Is A Gumiho / 간 떨어지는 동거
  • Also Known As: A Falling Cohabitation / A Terrifying Cohabitation / Gan Tteoreojineun Donggeo / Frightening Cohabitation / Live Together / Heart-Stopping Roommate / Gan Ddeoreojineun Donggeo / My Roommate is a Nine Tailed Fox
  • Genre: Comedy, Romance, Fantasy
  • Country: South Korea
  • Director: Nam Sung Woo
  • Producer: Park Joon Seo, Han Seok Won
  • Screenwriter: Na (webcomic), Baek Sun Woo, Choi Bo Rim
  • Production Companies: Studio Dragon, iQIYI
  • Network: tvN, iQIYI
  • Episodes: 16
  • Air Dates: May 26, 2021 – July 15, 2021
  • Air Time: Wednesday & Thursday, 22:30 KST
My Roommate Is A Gumiho - Cast, Summary, Synopsis

Synopsis of My Roommate Is a Gumiho

This drama started with the appearance of a 999 years old handsome gumiho, Shin Woo Yeo (Jang Ki Yong) who has been living her life mindlessly.

At the present moment, Woo Yeo transforms himself into a cool professor.

A gumiho just can live until it reaches the age of 999. After that, it has to turn into a human or it would be a truly evil spirit.

Woo Yeo always follows the rule to turn into a human by collecting a lot of energy of human he meets in a gumiho bead. If the time is right, he would turn into a human.

His story with Lee Dam (Hyeri) started when they first met each other in an accident. As a college student, she often spends her time having fun by getting drunk.

One day, she was forced to bring back her drunk friend, Do Jae Jin (Kim Do Wan) to come back home.

Unfortunately, Jae Jin made a mistake with Woo Yeo’s pricey car. After apologizing to Woo Yeo, she struggled to help Jae Jin stand well and eventually fell.

Before Dam fell to the road, Woo Yeo caught her and one of Woo Yeo’s beads entered Dam’s mouth. She unintentionally swallowed it and this was the biggest problem for both of them.

A human with a bead in her body could only survive one year before the bead will crush the person.

Not only that, Dam’s condition which had swallowed the bead can lead to Woo Yeo’s failure to be a human.

Because both of them have a similar condition, Woo Yeo suggested they to be cohabitation, at least until they find a solution.

Main Cast

Hyeri as Lee Dam

Lee Dam is a 22-years-old student of a university who never gets into a relationship and loves fried chicken so much. One day, she swallowed a bead from Shin Woo Yeo accidentally.

Jang Ki Yong as Shin Woo Yeo

Shin Woo Yeo is a 999-years-old nine-tailed fox who is handsome, smart, and cool. He has been collecting human energy in his beads from time to time.

He had a past lover and there was a tragic story behind it. This made him doesn’t want to fall in love again.

Yang Hye Sun as Kang Han Na

Hye Sun is a slow-witted gumiho, a friend of Woo Yeo who is approximately 200 years younger than him. But she has turned into a human. Hye Sun is a very romantic and ladylike person.

Kim Do Wan as Do Jae Jin

Lee Dam’s best friend since a teenager, and also Sookyung’s best friend in college. He has always been dumped by a girl in a previous relationship but he improves his relationship with Hye Sun.

Bae In Hyuk as Gye Sun Woo

A very handsome playboy and Dam’s senior in college. After meet Dam, he gains interest in her because Dam keeps avoid him.

Supporting Cast

People around Lee Dam & Shin Woo Yeo

  • Park Kyung Hye as Choi Soo Kyung
  • Choi Woo Sung as Lee Dan (Dam’s brother)
  • Oh Hyun Kyung as Lee Dam’s mother
  • Oh Jung Se as Do Jae Jin’s brother
  • Kim Do Yeon as Gye Seo Woo (Sun Woo’s sister)
  • Park Jung Woo as Gye Sun Woo’s father
  • Ha Min as Gye Sun Woo’s mother
  • Shim Hyung Tak as Gye Sun Woo’s uncle
  • Kim Kang Min as Jung Suk
  • Bang Eun Jung as Jeon Da Young


  • Go Gyung Pyo as Mountain Spirit
  • Lee Kyu Sung as Mountain Spirit

Seogwa University

  • Kang Na Ru as Seo Jin
  • Park Won Ho as Kim Moo Geun
  • Lee Poong-Woon as Bin Dae Hun
  • Kim Hyun Chi as Tae Jin
  • Son Sung Yoon as Professor Seo Young Joo
  • Kim Hyun-Mok as student
  • Min Dae Sik as professor
  • Park Sang Yong as professor
  • Park Jin Young as teaching assistant
  • Jung Ye Nok as fortune-telling booth girl
  • Lee Joon Hyuk as Professor Oh Sang Chul
  • Lee Dong Young as teaching assistant

Shin Woo Yeo’s Past

  • Bae Eun Woo as Woo Yeo’s victim
  • Jung So Min as Woo Yeo’s past love

Haemil Publishers

  • Han Ji Eun as Hwang Yoo Jin


  • Lee Jin Ri as Kim Ri Ra
  • Jo A Jin as Lee Min Ju


  • Han Ji Yoon as gisaeng
  • Shin Ye On as gisaeng
  • Lee Se Hee as gisaeng
  • Oh Ki Hwan as a detective
  • Lee Dong Yong as a hardware shop owner
  • Yoo Il Han as nightclub guy
  • Kim Eung Soo as Shin Woo Yeo
  • Lee Yoon Sang as news program man
  • Shin Hyun Jin as Sunwoo’s ex-girlfriend
  • Jang Sung Kyu as Park Jae Hyun
  • Na Seok Min as a detective
  • Kang Mi Na as Choi Jin Ah
  • Park Eun Young as a street vendor
  • Cha Sang Mi as restaurant employee
  • Park Sung Min as a purse snatcher
  • Lee Joon Young as a purse snatcher
  • Heo Soo Bin as a female university student

OST (Original Soundtrack)

  • DOOR (Your Moon) – Jung Se Woon
  • My All – Kim Na Young
  • Beginning of Our Drawing – Yoo Yun Jung
  • One Step Closer – Choi Nakta
  • Nothing Left To Say – KASSY (케이시)
  • Next To You – Yang Da Il
  • You & I – Choi Young Jae, So Yun (소연) of LABOUM
  • Moon – CHEEZE (치즈)
  • Big Change – Jung Yoo Ji