In episode 10 of KBS 2TV drama 'Big,' Lee Min Jung found out she had feelings for Suh Yoon Jae (Gong Yoo), whose soul was switched with that of a 19 year old Gang Kyung Joon.

In order to forget about Kyung Joon, Da Ran (Lee Min Jung) went to places she cherished with Yoon Jae. The place where they spent Yoon Jae's birthday, the bench where she drew a big heart on while waiting for Yoon Jae with her rented bicycle-Da ran visited them all and tried to reminisce on her past with Yoon Jae.

However much she tried to let the thought of Yoon Jae overwhelm that of Kyung Joon, Da Ran could not help but feel more for Kyung Joon. The time her heart beat as Kyung Joon told her that he was on his way to the park to see her, and her disbelief at having such feelings for him thus telling him to not come-these memories all arose within her.

As Kyung Joon returned home, his soul exited Suh Yoon Jae's body and he tried to return to his original body laid at the hospital. However, he had difficulty in doing so and unintentionally conveyed motion of Kyung Joon's body at the hospital. To this news, Da Ran hurriedly ran back home.

The sight of Kyung Joon having lost consciousness and fainted led Da Ran to heavy tears. As soon as Kyung Joon regained consciousness and assured her that it was him, Da Ran felt much better. She had poured out tears in fear of Kyung Joon's soul leaving the body.

Not knowing Da Ran's love for him, Kyung Joon teased, "You were disappointed that I didn't come back as Suh Yoon Jae, huh? Don't worry, he'll come back for you soon."