Netflix has confirmed the release date for its new series Eunjung and Sangyeon (written by Song Hye-jin, directed by Cho Young-min), starring Kim Go-eun and Park Ji-hyun. The drama will premiere worldwide on September 12, with a teaser poster and trailer unveiled ahead of its debut.

The series tells the intricate story of two friends whose lives remain entangled from their teenage years into their forties—constantly shifting between deep affection, admiration, jealousy, and resentment. The teaser poster's tagline, "Between Admiration and Resentment," hints at the emotional push and pull between Eunjung (Kim Go-eun) and Sangyeon (Park Ji-hyun), depicted standing before each other's blurred photographs.

The trailer opens with Sangyeon delivering harsh words to Eunjung, setting the tone for a relationship marked by two painful breakups and eventual distance. Eunjung confesses, "When I'm next to Sangyeon, everything I have feels ordinary and insignificant," while Sangyeon recalls, "That was when I knew—I could never truly win against her." Their connection is a mix of longing, inferiority, and complex emotions that many viewers may find relatable.

As the narrative unfolds, the series explores misunderstandings born from unspoken truths, the unmeasurable depths of friendship, and the emotional consequences when two once inseparable people drift apart. Director Cho describes the project as "a journey of companionship," adding, "Following Eunjung and Sangyeon's lives might make you revisit your past self or think of an old friend. It's about understanding, forgiving, and even discovering yourself."