Kang Jae Yoon and Ju Seong share a bond that traces back to their childhood, their families intertwined by years of camaraderie, marked by frequent gatherings and dining experiences at upscale hotels and restaurants. However, their relationship takes an unexpected turn during a family dinner when Ju Seong discovers her boyfriend checking into a hotel with another woman. Devastated, she seeks solace in alcohol, her heart heavy with betrayal. Amidst her sorrow, Jae Yoon, who has harbored feelings for Ju Seong for years, finds himself unable to stand idly by as she suffers. Overcome with emotion and driven by his long-suppressed affection, he kisses her in a moment of vulnerability and utters the words, “Let's stop being friends.” This moment signifies a pivotal change in their relationship, as Jae Yoon steps beyond the boundaries of friendship, driven by a desire to protect and perhaps, to love.

What The Friend?!