Over the course of three years, their one-sided love gradually solidifies into a sweet, bittersweet, yet genuine love. A playful joke on a forest path suddenly leads to a surprise kiss, an event that shakes Ha-neul's resolve.
But every time she faces her dazzlingly radiant girlfriend, Yeo Sae-byeok, Ha-neul is overcome by a deep sense of inferiority. Their first kiss on campus, coupled with Jeong- han's blatant hostility, pushes the precarious balance between the three of them into an even more tense situation.