Crash Course in Romance

Composer

• 
  Lim Ha Yong

Director

• 
  Yoo Je Won

Screenwriter

• 
  Yang Hee Seung

Main Role

• 
  Jeon Do Yeon

  Nam Haeng Seon

  Main Role
• 
  Jung Kyung Ho

  Choi Chi Yeol

  Main Role

Support Role

• 
  Lee Bong Ryun

  Kim Yeong Ju [Haeng Seon's best friend]

  Support Role
• 
  Oh Eui Shik

  Nam Jae U [Haeng Seon's little brother]

  Support Role
• 
  Shin Jae Ha

  Ji Dong Hui [Chi Yeol's secretary]

  Support Role
• 
  Roh Yoon Seo

  Nam Hae I [Haeng Seon's daughter]

  Support Role
• 
  Jang Young Nam

  Jang Seo Jin [Seon Jae and Hui Jae's mother]

  Support Role
• 
  Kim Sun Young

  Cho Su Hui [Su A's mother]

  Support Role
• 
  Hwang Bo Ra

  Lee Mi Ok [Dan Ji's mother]

  Support Role
• 
  Heo Jung Do

  Kang Jun Sang [Director of The Pride Academy]

  Support Role
• 
  Ji Il Joo

  Jin I Sang [Instructor of The Pride Academy]

  Support Role
• 
  Kim Da Hwin

  Jeon Jong Ryeol [Teacher]

  Support Role
• 
  Lee Min Jae

  Seo Geon Hu [Student]

  Support Role
• 
  Lee Chae Min

  Lee Seon Jae [Student]

  Support Role
• 
  Kang Na Eon

  Bang Su A [Student]

  Support Role
• 
  Ryu Da In

  Jang Dan Ji [Student]

  Support Role
• 
  Kim Tae Jung

  Lee Hui Jae [Seon Jae's brother]

  Support Role
• 
  Lee Ji Hae

  Ms. Jung

  Support Role
• 
  Lee Do Hye

  Jung Su Hyeon [Student]

  Support Role
• 
  Yoo Jun

  Lee Yeong Min

  Support Role
• 
  Jeong Han Seol

  Bae Jeong Su [Detective]

  Support Role
• 
  Park Hee Eun

  [Jin Su's mother]

  Support Role
• 
  Choi Hee Jin

  [Lee Yeong Min's mother]

  Support Role
• 
  Hwang Jae Yeol

  Song I Tae [Detective]

  Support Role
• 
  Jang Tae Min

  Do Gyeom [Detective]

  Support Role
• 
  Go Ae Ri

  Cho Ga Yeon [Psychiatrist]

  Support Role
• 
  Lee A Jin

  Lee Hyo Won

  Support Role

Guest Role

• 
  Kim Jun Won

  [Seo Jin's husband] (Ep. 1)

  Guest Role
• 
  Kim Shi Young

  [Teacher] (Ep. 1)

  Guest Role
• 
  Kim Kwon

  [Instructor] (Ep. 1)

  Guest Role
• 
  Lee Kyung Wook

  [CM director] (Ep. 1)

  Guest Role
• 
  Gu Bon Jin

  [Building security guard] (Ep. 1)

  Guest Role
• 
  Kim Eui Shin

  [Nation's Best Side Dishes' customer] (Ep. 1)

  Guest Role
• 
  Yim So Yun

  Lee Min Ji [Stalker student] (Ep. 1-2)

  Guest Role
• 
  Yoon Seok Hyun

  Song Jun Ho (Ep. 1, 10)

  Guest Role
• 
  Kim Min Chul

  Choi Chi Yeol [Teenager] (Ep. 2)

  Guest Role
• 
  Choi So Yool

  Nam Hae I [Child] (Ep. 2)

  Guest Role
• 
  Jung Hyun Woo

  [Teacher] (Ep. 2)

  Guest Role
• 
  Eun Na Young

  [Teacher] (Ep. 2)

  Guest Role
• 
  Kim Mi Ra

  [Audience student's mother] (Ep. 2)

  Guest Role
• 
  Kim Joong Don

  [Handball coach] (Ep. 2)

  Guest Role
• 
  Han Ye Ju

  [Consultation general manager] (Ep. 2)

  Guest Role
• 
  Kim Mi Kyung

  Jung Yeong Sun [Haeng Seon's mother] (Ep. 2, 7)

  Guest Role
• 
  Hong Ru Hyeon

  [English teacher] (Ep. 3)

  Guest Role
• 
  Shin Seung Yong

  [Police officer] (Ep. 3)

  Guest Role
• 
  Seol Chang Hee

  [Doctor] (Ep. 3)

  Guest Role
• 
  Oh Ki Hwan

  [Staff] (Ep. 4)

  Guest Role
• 
  Oh Eun Jin

  [Student] (Ep. 4)

  Guest Role
• 
  Lee Hyun Seo

  [Student's mother] (Ep. 4)

  Guest Role
• 
  Yoo Joon A

  [Student's mother] (Ep. 4)

  Guest Role
• 
  Lee Yoon Sang

  Mr. Yang (Ep. 5)

  Guest Role
• 
  Lee Mi Yoon

  [Mr. Yang's wife] (Ep. 5)

  Guest Role
• 
  Jung Hye Kyung

  [Meat vendor] (Ep. 5)

  Guest Role
• 
  Park Hyo Bin

  Kwon Jin Gyeong (Ep. 5)

  Guest Role
• 
  Do Ye Chan

  [Barista] (Ep. 5)

  Guest Role
• 
  Do Ye Joon

  [Barista] (Ep. 5)

  Guest Role
• 
  Hong Seong Gwan

  [ChiYeolSucks Group member] (Ep. 5)

  Guest Role
• 
  Lee Min Goo

  [ChiYeolSucks Group member] (Ep. 5, 8)

  Guest Role
• 
  Park Sun Ah

  [Jung Su Hyeon's mom] (Ep. 6)

  Guest Role
• 
  Kim Gun

  [Jung Su Hyeon's brother] (Ep. 6)

  Guest Role
• 
  Cho Yu Jin

  [Instructor] (Ep. 6)

  Guest Role
• 
  Lee Yong Yi

  [Noise complaint woman] (Ep. 6)

  Guest Role
• 
  Son Sang Gyu

  [Math king] (Ep. 6)

  Guest Role
• 
  Kim Seon Gyeong

  [Nation's Best Side Dishes' customer] (Ep. 6)

  Guest Role
• 
  Jung Sang Hoon

  [Fish market vendor] (Ep. 6, 12)

  Guest Role
• 
  Son Sung Chan

  Choi Jeong An [Principal] (Ep. 7)

  Guest Role
• 
  Park Yong Soo

  Nam Gung Chan [Doctor] (Ep. 7)

  Guest Role
• 
  Bang Min Sun

  Ms. Yoo (Ep. 7)

  Guest Role
• 
  Jung Eui Soon

  [Education director] (Ep. 7)

  Guest Role
• 
  Park Sun Young

  [Teacher] (Ep. 7)

  Guest Role
• 
  Shin Yoo Bin

  [T&A Law Firm staff] (Ep. 7)

  Guest Role
• 
  Bae Yoon Kyung

  Hong Hye Yeon [Pianist] (Ep. 7-8)

  Guest Role
• 
  Park Sang Hyuk

  [Detective] (Ep. 7, 10)

  Guest Role
• 
  Lee Soo Mi

  [Restaurant owner] (Ep. 8)

  Guest Role
• 
  Kim Jin Goo

  [Landlord] (Ep. 8)

  Guest Role
• 
  Hyun Jin

  Judge Yoo (Ep. 8)

  Guest Role
• 
  Shin Young Jin

  [Hotel restaurant manager] (Ep. 8)

  Guest Role
• 
  Shin Yong Jin

  [Hotel restaurant manager] (Ep. 8)

  Guest Role
• 
  Min Woo Gi

  [Real estate agent] (Ep. 8)

  Guest Role
• 
  Ahn Se Eun

  Lee Se Na (Ep. 9)

  Guest Role
• 
  Kwak Ji Sook

  [Choi Chi Yeol's neighbor] (Ep. 9)

  Guest Role
• 
  Lee Dong Hyeon

  [Woorim High School student] (Ep. 9)

  Guest Role
• 
  Park Yoo Mil

  [Questioner] (Ep. 9)

  Guest Role
• 
  Seo Dong Hyun

  [Wedding attendee] (Ep. 9)

  Guest Role
• 
  Lee Sang Yi

  [Livestreamer Mr. Popular] (Ep. 9-10)

  Guest Role
• 
  Park Sang Hwi

  Han Tae Hwa (Ep. 9-10)

  Guest Role
• 
  Lee Jin Hong

  [River bank passerby] (Ep. 10)

  Guest Role
• 
  Park Ji Hoon

  [Forensics officer] (Ep. 10)

  Guest Role
• 
  Oh Min Jung

  [Side Dishes' customer] (Ep. 11)

  Guest Role
• 
  Kim Gyeong Min

  [Triple Top executive] (Ep. 11)

  Guest Role
• 
  Lee Ji Hye

  [Veterinarian] (Ep. 11, 13)

  Guest Role
• 
  Park Hee Jung

  [T&A Law Firm staff] (Ep. 11, 15)

  Guest Role
• 
  Yoon Boo Jin

  [Vegetable vendor] (Ep. 12)

  Guest Role
• 
  Park Joo Yong

  [Delivery man] (Ep. 12)

  Guest Role
• 
  Lee Jung Joo

  [Photographer] (Ep. 12)

  Guest Role
• 
  Jun Joon Woo

  [Prosecutor] (Ep. 12-13)

  Guest Role
• 
  Park In Chun

  [Judge] (Ep. 12-13)

  Guest Role
• 
  Hwang Gyu Chan

  [Seong Hyeon's ex-classmate] (Ep. 12, 15)

  Guest Role
• 
  Lee Il Jin

  [Side Dishes' customer]

  Guest Role
• 
  Jang In Ho

  Nam Dae Nam [Police officer] (Ep. 13)

  Guest Role
• 
  Ma Jung Pil

  [Doctor] (Ep. 14)

  Guest Role
• 
  Ahn Soo Ho

  Jung Chan Gi [Security guard] (Ep. 14)

  Guest Role
• 
  Bae Hae Seon

  Nam Haeng Ja (Ep. 14-15)

  Guest Role
• 
  Noh Hee Joong

  [Protesting parent] (Ep. 15)

  Guest Role
• 
  Ko Gyeong Man

  [Protesting parent] (Ep. 15)

  Guest Role
• 
  Jung Min Gyul

  [Bang Dae Geun's girlfriend] (Ep. 15)

  Guest Role
• 
  Jung Seung Jin

  [Jung Seong Hyeon's ex-classmate] (Ep. 15)

  Guest Role
• 
  Jin Yeon Ae

  [Protesting parent] (Ep. 15)

  Guest Role
• 
  Kim Il Hyun

  [Side Dishes' customer] (Ep. 15)

  Guest Role
• 
  Kwon Seul A

  [Nurse] (Ep. 15)

  Guest Role
• 
  Choi Ga In

  [Student's mother] (Ep. 16)

  Guest Role
• 
  Lee Yeon

  Nam Haeng Seon [Teenager]

  Guest Role
• 
  Kim Gye Rim

  Hyun Seo Jin

  Guest Role
• 
  Choi In Sun

  Yeon Gyeong

  Guest Role
• 
  Sung Ki Yoon

  Bang Dae Geun

  Guest Role
• 
  Kim Joo Yeon

  [Student's mother]

  Guest Role
• 
  Choi Ha Won

  [Woorim High School student]

  Guest Role
• 
  Yoon Dong Hwan

  [All Care Program student]

  Guest Role

Unknown

• 
  Ryu Hae Jun Unknown
• 
  Yoo Da Hye Unknown