

By Dramabeans
I Know But
Kim Ga-ram
Jung Won
10
70 minutes
JTBC
South Korea
Korean
Source: Wikipedia

Jang Se-young, Na-bi's department junior.
Oh Bit-na, Na-bi's best friend.
Hwang Jin-soo

Jae-eon's mother
Nam Gyu-hyun, Bit-na's best friend.
Joo Hyuk
Kim Eun-han
A woman at the bar
Jo Min-young, a teaching assistant of the Sculpture Department.
Jung Sook-eun, Na-bi's aunt who raised her as a daughter.
Ahn Kyung-joon, Jae-eon and Na-bi's senior.
Yoo Hyeon-woo, Na-bi's ex-boyfriend.
Seo Ji-wan's friend
Yoo Na-bi, a student at Hongseo University's Sculpture Department who has given up on love but still wants to go out on dates. Due to a cruel experience with her ex-boyfriend, she no longer believes in destiny and has vowed never to fall in love again.
Yoon Seol-ah, Jae-eon's middle school classmate and ex-girlfriend.
Seo Ji-wan, Sol's best friend.
The older brother of Jae-eon's ex-girlfriend.
Park Jae-eon, a student at Hongseo University's Sculpture Department who thinks relationships are a bother but likes to flirt. He is kind and friendly to everyone but is actually uninterested in other people. He is an expert in playing hard to get and does not show his true feelings.
Yang Do-hyeok, Na-bi's childhood friend whose first love is her. He runs a popular cooking show on YouTube.