In "Bluebird House" Kyung Soo Jin expressed her one-sided love for Lee Joon Hyuk.

On the episode of KBS 2TV weekend drama "Bluebird House" (script Park Pil Joo, script Ji Byung Hyun), Kang Young Joo (played by Kyung Soo Jin) was head over heels in her crush for Kim Ji Wan (played by Lee Joon Hyuk).

On this day, Kang Young Joo said, "Everyone has different feelings. Just because someone has different feelings than I do, it doesn't mean that I can just push them." With this, she expressed her inner feelings.

Kim Ji Wan said, "You really have someone right? Then, just be yourself and be aggressive. That's your charisma. To be honest and direct. Don't worry about it and go head on" he advised. Nonetheless, Kim Ji Wan hadn't known that the person she had had a crush on was him.

Kang Young Joo then asked whether he had a crush on anyone and he said, "someone that I wish knew how I felt? Gee I don't know" and smiled.

At this, Kang Young Joo was under a misunderstanding that Kim Ji Wan had mutual feelings for her. In actuality, he had feelings for his boss, Suh Mi Jin whom he was seeing.