Choi Sulli was a spoiled little maiden who comes from a respected family at Korea. Rather than studying lessons she needed to study to, she study how to gossip everyday and spread rumours everywhere about anything, even though it's true nor fake. She never intended at spreading out rumours to the whole school, but it was an exception to her closest friends. Her loyalty to the fiction boyfriend from a famous upcoming boyband at Korea of hers was unbearable. But it's not like she was ignoring the whole boys at her class. She was loved by her kiddy attitude, her sudden raise of voice, and the way a crease formed in her eyebrows whenever she got upset. Even though it was a forbidden action, she like to curse quietly to herself whenever someone was bothering her. She often stuck in the corridor together with another students who arrived at school late, and get tons of punishment along with Park Chanyeol. They eventually earned some nicknames and remain like a school's wallpaper at the back of the line due to their high heights. Chanyeol had taken care of her countless of times - accompanying her day with his giddy wide smile, healing her injury himself without even bother bringing her to the school's hospital. Sulli felt as if Chanyeol was the place to solve all her troubles that she earn by her clumsy attitude, while Chanyeol just thought of himself as a good friend of her. Their feelings bloomed for each other at the late time - it was their graduation day, a day where they were supposed to separate from each other and carry their weight on their own back. It was almost impossible for Sulli, but a positive Chanyeol who never failed at making her days brighter once said, "I know at every meeting there is always a goodbye. But I know we will see each other again someday, because goodbye is not everything and could not separate us, Astro Twins, away."