Drama Not Even Out Yet, But Ahn Eun-jin and Seo Kang-joon Already Hit K-Drama Buzz Top 4

Ahn Eun-jin dropped 18 behind-the-scenes photos with co-star Seo Kang-joon on September 10th, and the internet immediately had questions about whether these two were actually dating. They are not, but the chemistry on display made that distinction feel almost academic.

The caption read, "A happy moment between Namgung and Mido. See you the day after tomorrow", a nod to their characters in the upcoming KBS2 drama Nobody But You (너 말고 다른 연애), which premieres on the 12th. The photos, shot in black and white, show the two actors forehead-to-forehead, arms linked, holding hands, and pulling faces at the camera like a couple who have been together long enough to stop performing for it. Which, to be fair, is exactly the point: they play a ten-year couple in the show.

What made the post genuinely take off was Seo Kang-joon's own comment underneath it. He typed "Midoya", calling out Ahn Eun-jin by her character's name, and left it at that. It was the kind of move that reads as sweet rather than calculated, and fans flagged it immediately.

The photos themselves

The series includes mirror selfies where both actors matched in all-black outfits, an elegant and quietly coordinated look. Other frames caught them leaning into each other, foreheads touching, expressions ranging from playful to genuinely soft. One shot in a flower field, the two just looking at each other, earned particular attention in the comments, viewers kept returning to the phrase "10-year couple energy" to describe what they were seeing.

Responses across social media reflected the same read. "This is openly a couple's Instagram," one commenter wrote. Others went with "they look like the real thing" and "the casting is perfect, I'm already excited for the broadcast."

The drama it's all building toward

Nobody But You premieres on KBS2 on the 12th as the network's new Saturday-Sunday drama. Ahn Eun-jin plays Lee Mido and Seo Kang-joon plays Nam Gung-ho, a couple navigating the quiet friction of a relationship that has lasted a decade. It is, in other words, a drama built entirely around the kind of chemistry that photo set was quietly advertising.

The pre-release numbers are already moving. Nobody But You landed 4th on the weekly K-drama buzz chart for the first week of September, and both lead actors placed individually in the top ten of the cast buzz rankings. For a show that hasn't aired a single episode yet, that's a meaningful signal, and a photo dump that reads like a couple's anniversary post probably didn't hurt.