Ai Haibara and Edogawa Conan are two young lovers who are trapped in the bodies of children due to the APTX 4869 poison. Despite the challenges of their situation, they have found happiness and support in each other and have decided to make the most of their time together. As they navigate the trials and tribulations of junior high school and life as a couple, they must also hide their relationship from their friends and the rest of the world, as no one knows their true identities. Along the way, they also try to find a way to break the curse of the APTX 4869 poison and return to their normal ages. Despite the obstacles they face, Ai and Conan remain determined to build a happy and fulfilling life together.