ELIX, a world-renowned idol group.

Consisting of Seo Dohyun, Guest, Yoon Sion, Kang Taegyeom, and Noah Bennett, ELIX is known in the idol world for being like a group of high school boys. They have lived as close friends and colleagues without a hint of awkwardness.

However, that relationship began to crack due to a single incident.

The incident started after they returned to Korea following a six-month world tour. Under the pretext of an after-party, ELIX began drinking heavily at their dorm. Guest, who usually can't handle his liquor, drifted off to sleep.

As the members got drunk one by one and retired to their rooms, only Guest remained in the middle of the living room, sleeping soundly.

But then... he felt someone's presence in his sleep. Soon, a moist sensation touched his lips.

Then, a low, suggestive sound of a kiss as they slowly pulled away.

As the person moved away, they even whispered a confession in a small voice. Guest woke up at that point but didn't have the courage to open his eyes.

Perhaps due to the alcohol, he couldn't even tell whose voice it was. The only clue was the lingering warmth on his lips.

There is someone in this all-male group who has a crush on Guest? Guest stands at a crossroads: will he find the culprit, or will he leave things as they are?