(Various) Only the Protagonist Can See Me

(The ending is terrible, the ending is terrible, the ending is terrible! There is no ending at all! Please, don't read this.) Chun Shu transmigrated and ended up attached behind Kudo Shinichi. Every day, she followed Kudo Shinichi around, seeing the world and meeting the goddess. Then Chun Shu ended up attached behind Kuroko Tetsuya, following him around to meet the Rainbow Team. Finally, Chun Shu met the little sunshine of her dreams. Taking advantage of the fact that only the protagonists of each world could see her, Chun Shu went wild and caused all kinds of trouble. Gradually, all the important characters became able to see her too. Chun Shu was in for it. I was the one who flirted with them, so I'll keep flirting even if I have to get on my knees. (Heads-up about potential pitfalls: 1. I'm a Conan and Ai fan, and this story pairs Conan and Ai. 2. A crossover with Detective Conan, Kuroko's Basketball, and volleyball. 3. This might turn out to be an OOC story. I'll try to keep everyone in character. 4. The heroine gets along well with everyone. Please don't complain that it makes no sense. 5. I don't know if I can keep Ai-sama in character, but I might not write her making the same sacrifices as in canon. 6. The author is a huge Ai-sama fan. Ai-sama is my little princess in this story! 7. I'm very happy with the heroine. If you think she does something wrong, please don't blame her; tell me instead. This story is temporarily on hiatus. I'm sorry, my little angels. Theme: