In "Bluebird House" Kyung Soo Jin showed a cute sense of jealousy towards Lee Joon Hyuk.

On the episode of KBS 2TV weekend drama "Bluebird House" (script Park Pil Joo, script Ji Byung Hyun), Suh Mi Jin (played by Um Hyung Kyung) was going on a business trip with Kim Ji Wan (played by Lee Joon Hyuk) and Han Eun Soo (played by Chae Soo Bin). Hearing this news, Kang Young Joo (played by Kyung Soo Jin) used it as an excuse that she needed to be reporting and when to Dae Gu as well.

Before this, JI Wan had given Young Joo advice now knowing that she had a crush on him. He said that she should tell whoever she had feelings for that she had a crush. Young Joo got courage from this advice and fell into sweet thoughts. Nonetheless, Young Joo was completely upset hearing that Eun Soo and Ji Wan were going on a business trip together.

After arriving in Dae Gu, she went to the hotel where Eun Soo, Ji Wan, and Mi Jin were. As she was there in secret, Jang Hyun Do (played by Lee Sang Yeop) misunderstood that she actually had a crush on him.