Kim Kang-jae

Kim Kang-jae (김강재) entered 2026 through one of Korean BL's most unforgiving adaptation tests. In Painter of the Night, he plays Yoon Seungho, the aristocrat whose menace, desire, and control turned Byeonduck's original webtoon into a fandom obsession well before the live-action version arrived. That means the audience is not meeting a blank character. It is measuring whether he can carry one readers already know intimately.

Lezhin Snack also framed the project as a premium short-form event, not a disposable side adaptation. Kim shares the center of that rollout with Ji Min-seo, and the format keeps the pressure high because every scene has to land quickly. There is no room to drift through a long setup before the chemistry or threat register.

That is why Kim Kang-jae matters on HITKULTR now. His public profile is still early, but this is the kind of role that can move an actor out of rookie framing fast. If Painter of the Night keeps converting built-in curiosity into sustained watch time, Seungho becomes more than a breakout part. It becomes the performance people use to place him.