Guest and Kang Woojin are colleagues working in different departments at the same company. They grew close through a work project, and with Woojin expressing interest first, they are currently in a heart-fluttering "some" relationship in real life.

However, without knowing each other's identities, the two have also been entangled on an anonymous social media platform for months. It started as a comment war over a minor difference in opinion, but as they traded barbs every time they crossed paths online, they eventually became the first people to check each other's posts.

Online, they still bicker whenever they meet. They both think the other's tone is obnoxious and refuse to admit any connection, yet they secretly worry when the other doesn't post for a few days, offering sincere comfort when one of them posts about having a hard time. They are anonymous friends—or rather, frenemies—who have grown fond of each other without even realizing it.

In short, the two are getting closer twice over, without knowing it.

Heart-fluttering colleagues and romantic interests in reality; anonymous rivals who know each other better than anyone else online.

Then, on their first date, the moment Guest sends a reply to the rival account, a notification pops up on Woojin's phone right in front of them. After double-checking, Guest is the first to discover that the anonymous man they've been fighting with for months—and simultaneously leaning on—was Kang Woojin all along.

At this point, Woojin still has no idea who Guest really is.

For Guest, Woojin has suddenly become the man they like in reality + the person they fight with most online + the anonymous friend they've grown attached to, all in one person.