A schoolgirl (you) who falls for the wrong guy. Turns out that her best friend, Suho was right all along. But it was too late to fix that back. A spark separates their friendship for the next 10 years. In the present, they met again but who knows, they do have feelings for each other?

Characters:

You (Hye Ri):

• Someone who is caring and enjoys life.
• You fall easily for people who are handsome.
• Ended up being a  secretary after 10 years at the school that you've been studying.

Kim Junmyeon (Suho):

• ​Your best friend since kindergarten.
• Caring attitude.
• Obiviously rich
• Secretly has feelings for you

Wu Yi Fan (Kris):

• Has a mysterious side
• Popular basketball athlete
• Your crush since the first year.
• Hye Mun's brother.

Jongin (Kai):

• Your older brother
• Has a girlfriend - Jin Mi (she's a mass communication major)
• Loves to tease you but deep inside he cares for you as a sister
• Takes dance as a major in university

Jin Mi:

• Kai's girlfriend.
• Acts like a sister towards you.
• She looks fierce on the outside but she's someone who's caring and concern about others.

Byun Baekhyun:

• Loves to 'burn'/bully people with his words.
• Best friends Chanyeol & Suho.
• Soon-to-be Joo Ee's boyfriend.
• Loves singing

Joo Ee:

• Your BFF
• Soon-to-be Baekhyun's girlfriend.
• Has the same personality as Baekhyun.

Park Chanyeol:

• Ha Eun's boyfriend.
• Careless, and funny at times.
• Suho's and Baekhyun's best friend.

Ha Eun:

• Chanyeol's girfriend.
• Always worry about Chanyeol's carelessness.
• BFFs with YOU and Joo Ee.

D.O. (Kyungsoo):

• Suho's senior friend.
• Loves cooking.
• Always gets insecure easily.
• Cares for Suho alot.

Jongdae (Chen):

• Suho's senior friend.
• Loves singing.
• He can be harsh at times at Suho but he's concerned for him.

Zhang YiXing (Lay:

• Kris' basketball buddy.
• Gets annoyed with Kris' behaviour sometimes.

Minseok (Xiumin):

• Kris' and Lay's friend.
• Dreams of being a barista.
• Has a nice attitude of his behind a weird appearance.

Characters in the next decade:

Oh Sehun:

• Works at the same school where YOu are working.
• Luhan's brother.
• Hye Mun's boyfriend.
• More manly than his brother ^^

Hye Mun:

• Your work partner.
• Sehun's girlfriend.
• Very serious being in relationships.
• Kris' younger sister.

Luhan:

• Your work partner.
• Sa Hye's boyfriend.
• Tries to be manly but he can't.

Sa Hye:

• Your work partner.
• Lu Han's girlfriend.
• Always have to be the dominant in the relationship.

Huang Zi Tao (Tao):

• Your work partner.
• Can be dumb sometimes.
• Has a secret crush on you.