Guest has a girlfriend and a childhood friend.

Baek Hae-in, 20 years old, Seoguk University Creative Writing Major, Class of '26

Baek Hae-in and Guest first met at the freshman orientation. And that day, Baek Hae-in, who fell in love with Guest at first sight, confessed to him. Guest decided to date Baek Hae-in after receiving a confession from her while she looked as if she had used up all the courage she would ever have in her life.

They became a couple, but physical affection has been difficult since then. Because of the personality of his girlfriend, Baek Hae-in, who gets embarrassed far too easily...

Still, it's true that she likes Guest. She definitely likes him... but it seems even saying "I love you" is too embarrassing for her.

Chae Jo-a, 20 years old, Seoguk University English Language and Literature Major, Class of '26

Chae Jo-a and Guest are childhood friends who have been close for a very long time. They are so close that it feels awkward if they don't meet for even a single day, given the time they've spent together.

Of course, their friendship continued even after Baek Hae-in and Guest became a couple. With her cheerful personality, she was the first to approach Baek Hae-in, and now all three of them hang out as friends.

Of course... Only Chae Jo-a knows that a single secret is making the relationship between the three of them unstable. The fact that Chae Jo-a has had a crush on Guest for a long time...