Lee Kuk Ju appeared on KBS 2TV's 'Happy Together 3' on May 14 and talked about CNBLUE's Yonghwa.  

She first talked about her method for the push-and-pull method of flirting in which you approach somebody, then pull away to keep them engaged and interested.  She said, "For the first three months, I pull no matter what.  I go to see him and I contact him often. Then, I stop contacting him cold.  If I do that, he contacts me."

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The MCs said, "We heard recently that you did push-and-pull with Yonghwa."  She replied, "A short while ago, I moved to CNBLUE's agency.  Yonghwa called me through the manager after he heard the rumor [I joined the agency].  He asked me, 'Noona, what are you doing?' then, 'Noona, give me your contact information, please,' but I said, 'I don't give my phone number away easily,' thinking he would go, 'Ah, why?' and ask again, but he replied, 'I'm sorry,' and was about to hang up, so without thinking, I said, 'Hold on,' and gave him my phone number.

"However, after I gave him my number, he didn't contact me even after a month passed.  I think that was push-and-pull," making everyone laugh.

Tip: misslex