《探索模拟信号的魅力与应用》溪夕汐换q游戏笔趣阁

　　At a city in near future, Heejeong rides her bike to a shabby market. She searches through a second-hand bookstore but is unsuccessful in finding the DVD she is looking for. Heejeong becomes discouraged but runs to another store where she hears the news that the DVD is in stock at another store. At last she finds the DVD on the opposite shelf, but Jiwon, a boy similar to Heejeo... (展开全部)