Actor Park Sung Woong appeared on SBS's 'Good Morning' on February 12 and let slip a secret of his 'Remember' co-star's Yoo Seung Ho!

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He said, "During filming, Yoo Seung Ho keeps calling Song Ha Young (played by Jung Yoo Min) Oh Ha Young.  I found out later on that there's an Oh Ha Young in A Pink.  Yoo Seung Ho is a huge fan of Hayoung."

He then said, "But I don't know if I can say this.  Please edit this," causing laughter.  TOO LATE.  The secret's out!