"Let's kiss just once, okay?" With her outstanding beauty and natural flower-like smile, Song Ha-eun captivates the hearts of many. Even she, who seems perfect in every way, has one flaw, and that is that she is asexual. She tried everything to feel sexual attraction, but ultimately, the only thing that became clear was her identity as an asexual, with no significant results. However, one day, her life takes a 180-degree turn when she meets a woman on a crowded bus who ignites her feelings with just her voice. * * * "Unnie." Staring intently into Yeojin's eyes, Ha-eun began to approach her. Yeojin unconsciously took a step back, feeling that she should do so for some reason. "P-please talk from there." She stammered and hurriedly spoke, but Ha-eun paid no attention. Instead, she boldly took another step closer to Yeojin. "D-don't come any closer..." With each step Ha-eun took forward, Yeojin stepped back to maintain distance, but soon realized there was nowhere left to run. In her anxious heart, she tightly clutched the clothes in her arms. She was just a 21-year-old girl, and a smaller girl at that. In contrast to Yeojin, who was curled up like a shriveled snail, Ha-eun stood confidently. After staring into Yeojin's eyes for a moment, she slowly parted her lips. "Just once." From her slowly but clearly spoken words, "Let's kiss." The moment the unexpected words slipped out, "Us." Yeojin froze on the spot.