The Magician's Box

Shinichi Kudo had learned a lot since he'd become Conan Edogawa. But he was completely ecstatic when Haibara told him that this pill should be a permanent cure to APTX 4869, and that she was confident that, once taken, Shinichi would never have to be Conan again. A little careful planning ensured no one would have reason to become suspicious of Conan's leaving for America or Shinichi Kudo's return.
It's been two weeks since Shinichi came back, since he returned to himself and was able to settle back into life as an adult. Kid has sent an advance notice for tonight at eleven. The task force has gathered at the museum the jewel rests in, and Shinichi is sure he can catch Kid. He'd gotten close a few times as Conan, and now he had the speed and strength to get him locked away for good.

He never expected that he'd be the one locked up...

ShinKai.
Soft Yendere Kaito.
Will eventually have some light smut.
Lots of fluff.
Kaito doesn't know Shinichi was Conan.

Will probably have some mildly disturbing scenes as the story progresses.

Top Ranking #3 in SHINKAI