Han Gyeom and Seoyoon have been inseparable childhood friends for 30 years. Their bond was unbreakable—until one reckless mistake shattered everything they knew. Now, they stand at a crossroad, unable to return to being "just friends" but unwilling to fully commit to being lovers. The air between them is thick with confusion and unresolved tension. Han Gyeom, however, seems determined to keep this ambiguous, heated relationship going.

But Seoyoon is struggling with the weight of their choices. He realizes that their decades of comfortable friendship are hanging by a thread, and the silence is deafening. Han Gyeom forces the issue, laying down an ultimatum: either they continue their confusing partnership, or they cut ties completely.

Faced with losing Han Gyeom forever, Seoyoon turns pale. Han Gyeom, sensing his confusion, suggests a final, intimate test: "Still confused? Then let’s check again. Whether I can still be just a friend to you." As Seoyoon looks into Han Gyeom’s burning, resolute gaze, he knows for certain that they have already crossed a river they can never return from. This is the intensely complicated and passionate story of what happens when friendship ends, and something much hotter begins.

/ Alternatives: 우정의 끝맺음