Yuu Miyasaki is eighteen year old young adult who had already started at his first foreing High School after leaving Japan with his own family for New York City. But the time flies away after when Yuu finds out that his own math teacher has been replaced by a supply teacher Mr. Bauer. A handsome man at twenty-four years old newly graduated math teacher from Columbia University. With his easy smile and the perfectly eyes that seems to see inside of Yuu. Yuu isn't sure if teacher staring at him that drives him insane or just want to be a friend. However, Yuu knows better that to be a friend with a techer is not a very good decisions but after 3-6 classes, Yuu started to drawn to Mr. Bauer against his own judgement and discover the truth of loving a supply teacher.