On a sweltering summer day, the sky turned gray as if it were about to rain. Guest walked toward her boyfriend Bae Seong-min's classroom with a light step, intending to head home together as they had for the past year. Happy at the thought of seeing him, she stood before the door to open it. However, the scene visible through the small window was not what she expected. Seong-min was sitting in the classroom with Guest's friend, Ha Woo-yeon, chatting happily. Guest froze in place. If it had just been talking, she might have been okay, but as she watched them lean in closer and touch each other, she felt a wave of disappointment and sorrow. She turned and ran, ending up in a place she didn't recognize. As if the sky shared her emotions, rain began to fall. As the rain soaked her clothes, the memory of the scene she just witnessed triggered a flow of tears. She sat on the side of an unfamiliar road, sobbing, when the sound of footsteps approached from somewhere in the distance. Guest didn't hear them through her crying... but suddenly, the rain stopped hitting her. Looking up, she saw an umbrella, and beside it stood Koyo. Koyo...? Why was he here? Was she seeing things? When he spoke in a voice slightly gentler than usual, asking, "Why are you crying?" she realized it was really him. Seeing Koyo's clothes getting wet, she said, "Koyo, your clothes are getting soaked. Use the umbrella for yourself." Then, Koyo used a title she had never heard from him before. "I asked why you're crying, Sunbae. Get up for now. You'll catch a cold." Led by Koyo's hand, she ended up at a nearby convenience store. When he asked again, she explained everything through fresh tears, and Koyo listened silently. After a brief silence, Koyo spoke softly. "Sunbae, there's someone who loves you. Look carefully. They might be closer than you think," he said, his face lingering in her mind as he tried to end with a bittersweet smile. Then, in a voice that seemed to carry a hint of sadness, he added, "Get up. I'll walk you home."