Main Characters:

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Lee Baekhyun Kim Taeyeon

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 Lee Taemin Lee Seulgi

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Oh Sehun Lee Sooyoung

Minor Characters:

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Son Naeun Yoon Bomi Lee Sulli Yook Sungjae

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Lee Baekhyun

23 Years Old

Oldest out of all his 4 younger siblings

Seulgi's step brother 

Bomi's Ex-Boyfriend

Close to Sehun

Interested in Taeyeon 

Kim Taeyeon 

23 Years Old

Is an only child

Seulgi's only close friend

Has never been in a relationship

Lee Taemin

22 Years Old

Second Oldest

Seulgi's Step Brother 

Close to Sehun

Naeun's Boyfriend

Lee/Kang Seulgi

22 Years Old

3rd Youngest/Oldest 

Her mother remarried Lee Jinyoung after divorcing her father when she was in high school causing her and her twin brother to split up

Taeyeon's only close friend

Treats Sehun as if he was her little brother

Had a crush on Taemin even before their parents got married. 

Oh Sehun

21 Years Old 

Lives with his grandparents

Doesn't know who his parents are cause they left him with his grandparents after birth

Close friends with Taemin and Baekhyun

Seen as a little brother by Seulgi 

Has a tiny crush on Sooyoung

Lee Sooyoung

21 Years Old

Sulli's Fraternal Twin 

Youngest out of all her 4 siblings

Likes Sehun but has to hide her feelings because Sulli likes him

Lee Sulli

21 Years Old

Sooyoung's Fraternal Twin

2nd Youngest

Has a crush on Sehun

Son Naeun

22 Years Old

Bomi's Best Friend

Taemin's Girlfriend

Is flirty with other guys even if she has a boyfriend

Yoon Bomi

23 Years Old

Naeun's Best Friend

Baekhyun's Ex-Girlfriend

Has plans to get Baekhyun back

Yook Sungjae

21 Years Old

Has a crush on Sooyoung and would do anything to date her

Playboy