This drama is adapted from the manga of the same name. It tells the story of Machi Onodera, who is a teacher at the high school she used to attend. A handsome transfer student Chiba Yuto comes to her class. Yuto is the younger brother of Machi's first love in high school, Chiba Yuichi, and looks almost exactly like Yuichi in high school. Memories of her first love come flooding back to her, and she accidentally meets Yuichi again at a cocktail party. Every time she sees him, she thinks of her first love, and she can't take her eyes off her brother Yuto and her first love Yuichi whom she admired in high school...