One of the best things about It’s Okay to Not Be Okay was the amazing chemistry between lead actors Kim Soo Hyun and Seo Ye Ji. Perhaps their romance was so convincing because they almost kissed six years ago.

Netflix‘s It’s Okay to Not Be Okay was the first time Kim Soo Hyun and Seo Ye Ji starred opposite each other in a K-Drama, but they were dripping with chemistry from the first episode.

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Even when Moon Kang Tae and Ko Mun Yeong were at odds with each other, the pair always had the most believable romantic tension.

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And while kisses in dramas can sometimes be awkward, this couple’s smooches were unwaveringly passionate.

But It’s Okay to Not Be Okay wasn’t the first time Kim Soo Hyun and Seo Ye Ji were embroiled in a romance. In fact, the pair almost kissed six years ago, back in 2014!

What many fans of the drama don’t know is that these two actors starred in a commercial film for Petitzel pudding long before they came together this year.

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Kim Soo Hyun was a regular model for the sweet dessert brand, and in one CF, Seo Ye Ji joined him as his romantic opposite.

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The ad featured both actors in business attire sitting on a park bench. After Kim Soo Hyun asked, “Does a kiss taste like a pudding, or does a pudding taste like a kiss?“, the two leaned in tantalizingly close…

But unlike on It’s Okay to Not Be Okay, the pair didn’t actually kiss. Instead, Kim Soo Hyun fed Seo Ye Ji a spoon of pudding—cute!

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Even in this 30-second CF, the two already had awesome chemistry. No wonder Kang Tae and Mun Yeong had such a convincing romance on screen!