Aoki couldn't believe that you were thinking about him like that..." Aoki Sōta (Michieda),a young man, falls for his kind and beautiful classmate, Hashimoto Mio. One day, when he borrows Mio's eraser and sees another guy's name with a heart engraved on it, Aoki feels surprised and disappointed. Lost in thought, he accidentally drops the eraser. Ida Kōsuke (Meguro) happens to pick it up and sees his name + ❤️ on it, leading him to misunderstand Aoki's feelings. To protect Mio's true intentions, Aoki is forced to lie and claim the eraser as his own. This misunderstanding leads to more misunderstandings, creating confusion in their words and actions. However, it is through these innocent and sincere gestures that their friendship and "first love" blossom among these naive yet precious high school students...?!