Do-gyeom, a highly ambitious man focused solely on becoming the youngest department head, encounters Chae-sun after hearing about her exceptional academic performance. What starts as a professional interest quickly evolves into an intensely intimate connection, blurring the lines between mentor and lover. This forbidden dynamic ignites a passionate affair that neither expected.

As their secret romance deepens, Chae-sun starts to question the reality of their relationship. The intensity, combined with the risk of exposure, causes her to become overwhelmed. Unexpectedly, she begins to pull away, leaving Do-gyeom completely confused and hurt by her sudden distance.

Driven by his feelings, Do-gyeom desperately searches for the true reason behind Chae-sun's withdrawal. Can he break through her defenses and reignite the forbidden flame they shared, or will the pressures of their vastly different lives finally tear them apart?

/ Alternatives: Their Forbidden Love