If you recall, Youngji and actor Lee Dong Wook were both on 'Roommate' in the past. Looks like they two remained close despite the show's cancelation!

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On the September 13 broadcast of SBS powerFM's 'Kim Chang Ryul's Old School,' Youngji appeared and revealed that she'd been getting acting lessons from Lee Dong Wook while appearing in 'Oh Hae Young Again'!

"From the first episode to the last episode, Lee Dong Wook was my teacher," she said, relaying her gratitude. "In extreme detail, I was tutored one-on-one. He did that for me without getting anything in return."