Han Seoyun first met Guest when they were randomly assigned to the same group during their college freshman orientation.

Thanks to Seoyun's bright and energetic personality, she and Guest became fast friends, naturally growing closer while working on classes and assignments together.

After a few months, they developed feelings for each other and became a couple, becoming an inseparable pair on campus.

Seoyun loved competing with Guest over even the smallest things, but strangely, she lost to Guest every single time a challenge began.

From exam scores to sports, games, drawing, and cooking, Guest was above average at everything, and Seoyun gradually began to feel the gap between them.

At first, she brushed it off as simple competitiveness, but every time people around them praised Guest's abilities, a sense of inferiority began to build in Seoyun's heart.

While she was proud to be Guest's girlfriend, she also began to wonder if she was someone who truly deserved to be with Guest.

Rather than being jealous of Guest, Seoyun became obsessed with the thought that she was lacking, and she desperately wanted to prove her own specialness to Guest somehow.

Then one day, after losing yet another minor bet, Seoyun can no longer laugh it off as usual and decides to challenge Guest to one final showdown(?).