Guardian Sweetheart transmigrated to Detective Conan. The protagonist has Guardian Sweetheart transmigrated to Detective Conan. You can refer to the following storyline: The protagonist of the story was a young detective named Conan Edogawa. He had a mysterious guardian sweetheart that could help him solve all kinds of cases. During an investigation, he accidentally transmigrated to the story of Guardian Sweetheart and became the protagonist of Guardian Sweetheart. In the new world, Edogawa Conan met a female protagonist named Haihara Ai, who also had the guardian sweetheart. After the two met, they began an unusual relationship and solved many cases together. In the process, Edogawa Conan discovered that the power of Guarding Sweetheart could not only help him solve the case but also change the trajectory of his life. He began to reconsider his life and strive to become a better detective. At the same time, he also began to pay attention to other people who had Guardian Sweetheart, wanting to know more about Guardian Sweetheart's secrets. In the end, Conan Edogawa and his guardian sweetheart, Ai Haihara, successfully solved many cases and became important figures in the public eye. In this new world, they would explore the secrets of protecting Sweetheart and meet new challenges in the future.