In "Cantabile Tomorrow" Shin Eun Kyung started to interpret Joo Won's intentions in whatever way she wanted.

On the episode of KBS 2TV Monday/Tuesday "Cantabile Tomorrow" broadcast on November 11th, Sul Nae Il (played by Shim Eun Kyung) started to misunderstand her relationship with Cha Yoo Jin (played by Joo Won).

On this episode, Sul Nae Il started to read a book about dating. Then, she said to Cha Yoo Jin, "We're past the first step of the green line and the second step of hard-to-get. The only step remaining is dating." Cha Yoo Jin ended up throwing that book away from her.

Seeing this, Sul Nae Il picks up the book and suggests that they should go step by step according to the book. The first thing that she suggests is changing her name in her phone to Sul Rae lm (nervousness) with a heart. Though Cha Yoo Jin changed her name, he ended up not putting the heart at the end. Sul Nae Il showed her disappointment saying, "The heart is the most important. The other words are just similar."

Cha Yoo Jin heard this and said, "You're really not appreciative these days. Why are you so stubborn. I even changed your name!" Nonetheless, Sul Nae Il went ahead and changed his name as she pleased.