"When a Man Falls in Love" Shin Se Kyung finally realizes that Song Seung Hun is a very good man after their breakup.

May 30, the 18th episode of the MBC drama "When a Man Falls in Love" featured Han Tae Sang (Song Seung Hun) emotionally stable while Seo Mi Do (Shin Se Kyung) was the opposite after their breakup.

When Lee Jae Hee (Yeon Woo Jin) refuses to believe the secret about his birth, Han Tae Sang goes to Seo Mi Do to show her the letter Lee Chang Hee (Kim Sung Oh) had left for him. As he leaves Seo Mi Do's bookstore, he picks out a book that he had been wanting to read and takes out his money.

Seo Mi Do refuses to take the money and says, "Just take it. Don't do this when I stayed at your place countless days and ate your food." However, Han Tae Sang replies, "That was then. You were a special person to me back then but now you're just a daughter of the bookstore owner."

Seo Mi Do is very disappointed. She then follows after him to give him the money back and says, "You are still special to me. I liked you and hated you and you helped me. I'm sorry and I still have feelings of regret left. How can I see you as a mere customer. If you're going to pay for your books, go to a different bookstore from now on."

When Seo Mi Do returns, she finds a photo of her with Han Tae Sang while she organizes her belongings. Instead of throwing it out, she keeps in safely.

Meanwhile, Lee Jae Hee refuses to believe the truth about his birth even when Seo Mi Do tries to tell him. Disregarding Seo Mi Do's words, Lee Jae Hee tells her that he has found Han Tae Sang's little brother. Seo Mi Do suggest on telling Han Tae Sang right away but Lee Jae Hee tells her, "I'm going to make Han Tae Min destroy Han Tae Sang with his own hands." Seo Mi Do is shocked and becomes angry at Lee Jae Hee.