Who Is She

Daniel is firm despite what Ae-sim says. He threatens Ae-sim to leave if she kicks Du-ri out, and Du-ri's heart races to see that. When Ae-sim backs down, a dark shadow draws on her. Meanwhile, both Janet and Du-ri fill in for Mal-sun's gap in their own ways. Du-ri invites Ji-sook to UNIS. Including Ha-na, the three of them have a good time after a while. At that moment, Ji-sook receives a call from Min-seok.

Mal-sun's old secret is unveiled when Ji-sook's father dies. Ji-sook realizes there was a misunderstanding between her and Mal-sun. She's finally ready to rely on her mom, but Janet disappears. Meanwhile, Ae-sim was looking for a way to expel Du-ri. Then she takes Ji-an's advice and leaks Du-ri and Park-jun's scandal. Yet, Daniel's feelings for Du-ri don't change. When the two realize their feelings for each other, they go on a secret trip together.

Daniel holds a press conference and reveals that Yoo Ji An was the one who manipulated Doo Ri's dating scandals and that she was his stalker, not a girlfriend. Ji An threatens Ae Shim that she'd reveal Daniel and her secret if the matter isn't taken care of. Meanwhile, Mal Sun realises that her body is getting old and fears that she might return to her old self.

Mal Sun has to choose between returning to her old self or living as Doo Ri but disappearing after six months. Her twin sister Kkeut Sun comes back to her, and Mal Sun realises that she was in fact Emily. Mal Sun contemplates before making her final decision as she can't imagine not being able to live as Ji Suk's mother. Right then, Ji Suk tells her something that helps her make a decision.