- IU as Lee Soon Shin
- Go Doo Shim as Kim Jung Ae
- Jung Dong Hwan as Lee Chang Hoon
- Kim Yong Rim as Shim Mak Re
- Son Tae Young as Lee Hye Shin
- Yoo In Na as Lee Yoo Shin
- Jo Jung Suk as Shin Joon Ho
- Kim Gab Soo as Shin Dong Hyuk
- Go Joo Won as Park Chan Woo
- Lee Mi Sook as Song Mi Ryung
- Kim Yoon Seo as Choi Yun Ah
- Jung Woo as Seo Jin Wook
- Lee Ji Hoon as Kim Young Hoon
- Lee Ji Hoon as Jo In Sung
- Yoon Da Hoon as Hwang Il Do
- Bae Geu Rin as Shin Yi Jung
Drama starts where it left. Joon-ho asks Soon-shin to sign a contract for her training in his agency. She starts crying and says that she is not interested.
At home, mom tries to keep herself busy in house chores in order to forget her sadness. But she is really very sad and seems lost.
Chan Woo tells Yoo-shin to take her refund, but she tells him that she never asked for it in the first place. She is also sad.
Young-hoon again tells Joon-ho that he should not play with Soon-shin just because he still thinks about Yun-ah. The latter denies this and tells him not to interfere in his life.
Soon-shin meets Chan Woo on her way back home, but Yoo-shin also comes there and starts shouting at her. Chan-woo interrupts but she argues with him as well.
At home, mom tells Soon-shin that she should not feel disheartened and it’s not her fault.
Mi-ryung goes for the shoot, but she is scared and annoyed as she remembers about that accident. Yun-ah comes there and brings kimbap for her. Mi-ryung thinks that she wants to be her daughter and tells Yun-ah that she accepts her as her daughter as she always wanted to have one.
Joon-ho’s dad comes back without notice and thus finds out about Yi Jung coming home from abroad. He books a plane ticket to make her go back. She runs from home.
Joon-ho prepares the contract papers and again goes to Soon-shin with it. She thinks about the conman, who said exactly the same words and thinks Joon-ho is also a swindler. She rejects his offer. Joon-ho gets a call from Yi-jung that she has come to his office. He leaves. Soon-shin then asks Young-hoon if he really is Shin Joon Ho. He thinks a bit and tells her that he is just joking (in order to save her from Joon-ho’s silly challenge.)
Yi Jung sees Soon-shin’s photos in Joon-ho’s office and tells him that how can he make a girl like Soon-shin an actress, and not her.
Hye Shin asks her friend to look for some job for her. She later switches on her dad’s phone, which receives messages from the same cake shop owner. She goes there and takes the cake. He starts arguing about how irresponsible they are, then she tells him about her dad’s accident.
At home, grandma starts shouting at Soon-shin, at which mom tells her that she is also equally responsible and that they all are very sad, not only her.
Hye-shin tells Soon-shin about the cake that dad ordered on her birthday. Mom also comes there. There is also one letter that says:
Dad’s too forgetful these days,
I’ve forgotten about your birthday.It’s late but happy birthday. Sun Sin. Do you know you are Mom and Dad’s precious daughter? It’s okay to be ordinary. Your existence is special. Your existence is precious. You’re the best, Lee Sun Sin.
Mi-ryung gets a call from Yi-jung to meet her. Soon-shin’s mom is busy arranging some old things when she sees the photograph of Soon-shin’s dad with Mi-ryung, when they were young.
Yi-jung goes to the same restaurant where Soon-shin works. When she sees her, she starts shouting about what her brother saw in her and how did she seduce him. Soon-shin doesn’t understand what she is saying. Yi-jung accidentally spills coffee on herself, but blames Soon-shin for this. Soon-shin apologizes but Yi-jung doesn’t stop there. She tells Soon-shin that is this her father taught her. Now, Soon-shin gets angry and tells Yi-jung to apologize instead. Yi-jung raises a glass of water to splash on Soon-shin but she holds her hand and the water spills on Yi-jung’s hair. At that moment, Mi-ryung enters the restaurant. Soon-shin sees her.
- You’re The Best Lee Soon Shin (Episode 5)
- You’re The Best Lee Soon Shin (Episode 4)
- You’re The Best Lee Soon Shin (Episode 3)
- You’re The Best Lee Soon Shin (Episode 2)
- You’re The Best Lee Soon Shin (Episode 1)