Plot introduction: The only place where two poor boys can relax is in a playground full of stars under the night sky. Hanjun thought he was the only one looking up at the stars, but he didn't know there were other people in the same space. Hanjun greeted him, and the boy responded with "hello". Under the night sky full of stars, the two lonely and poor boys, Hanjun and Yucai, met each other. After meeting for the first time in junior high school, Hanjun and Yucai were admitted to the same high school and are working hard to get into the same university. They spend the intense daily life of senior high school students with all kinds of friends, including the charming Yoon Chaeyoung, the always cautious Park Jinhwan, and the wholeheartedly focused Lee In-kyu. But Hanjun always feels that he has the most fun and the most fun when he is with Yucai. Therefore, one day, Hanjun realized that the feelings in his heart are not just friendship, but something else... One day, Chaeyoung, who has always had a crush on Yoojae, decides to confess her feelings. Hanjun becomes confused upon hearing the news. Hanjun, realizing his true feelings, decides to sort out his heart... For one boy, it is a unique friendship, but for another boy, it is a unique love. A youth story that shines like a star begins...