Seo Joohyun

- She lives with her mother that raised her alone without a father figure. Seohyun is an introvert.

 

Kang Minhyuk

- He is a sweet guy, he likes Seohyun's personality and Seohyun in general, he likes being with Seohyun.

 

Jung Jinwoon

- Seohyun's fiance, he loves Seohyun very much even though Seohyun sometimes rejects him.

 

Jung Nicole

- Jnwoon's ex-girlfriend. She is also one of Seohyun's few friends, she helps strengthen Seohyun and Jinwoon's relationship even though she's really hurting inside.

 

Son Dongwoon

- Seohyun's close friend. He likes Minhyuk a lot but he also knows Minhyuk's feelings towards Seohyun.

 

Lee Kiseop

- Nicole's present boyfriend and Minhyuk's childhood best friend. He likes going to parties and drinking, he often gets drunk that causes him and Nicole to fight.

 

 

Seohyun and Jinwoon's other friends:

Nam Woohyun

Kim Kibum (Key)

Lee Minyoung

Lee Jaejin

Bang Mir

Im Nana

Choi Minho

 

Minhyuk's friends:

Goo Hara

Jung Jinyoung

Lee Jungshin

Lee Howon

Lee Sungyeol

Kim Joonmyun

Kang Jihyun/ Soyou

Shin Wonho

 

The three Chinese exchange students:

Zhang Yixing

Bin Yubin

Luo Yusheng

 

Kang Jiyoung

- Minhyuk's pesky and bratty younger cousin.

 

Lee Hongbin

- Jiyoung's shy yet masochistic boyfriend.