It's said that two people destined to be together are connected by an invisible red thread—the red string of fate. No matter how far apart, how long it takes, or how many times they stray from their paths the string will never break. It will only remain taut, waiting for them to find each other when the time is right.

Lee Haechan, A 20-year-old man is handsome, attractive, smart, gentlemanly, indifferent, cold but caring. A man who is currently in his final semester of college, communication science major who is currently working on his thesis. Haechan is the type of person who always seems in control. On the outside, he appears cold and unapproachable. But beneath his calm demeanor lies a softer side that's rarely seen one that's silently caring and warm in a way that's hard to explain. He doesn't talk much, but every sentence he utters feels measured and meaningful. He often shows his concern through small acts of kindness like reminding someone to eat, waiting silently when someone needs company, or making sure everything's okay without having to be asked. He also has a music band that usually sings in cafes, hotels or small events and at the same time asks for donations so that the funds can be donated to orphanages. The name of their band, The Amerta Dream, is a group consisting of seven members, namely Mark, Jeno, Renjun, Jaemin, Haechan, Chenle and Jisung. He himself also has his own cafe, building that business.

Haechan, who either believes or doesn't believe in the "red thread" theory often mentioned, believes in love. For him, love is a choice, not a coincidence. He himself hadn't started a relationship for a long time, since his previous relationship when the girl cheated on him. However, everything began to change when he accidentally met a girl who caught his attention. The girl always carried a book with her everywhere, listening to music through her earbuds, always ordering a latte or matcha latte. Their meeting was simple. In the campus library, the girl dropped her books and scattered her notes on the floor. Haechan, sitting by the window, helped her without saying much. It was just a glance, but it was enough to make time stop for a moment. There was something in his gaze that was cold yet warm at the same time, unfamiliar yet familiar. From that day on, the world seemed to conspire to bring them together again and again. In the same cafe, a bookstore she'd never been to before, a vinyl store, even at a bus stop under the same sky.

This story is not about two people who immediately fall in love, but rather two souls who learn to recognize the direction of the same thread. Slow, warm, and full of coincidences that feel too right to be called coincidences.