Strawberry milk helps you grow, tantei-kun

Gintoki is suddenly transported into Detective Conan and "shrunk" (more like rejuvenated by 10 years) by the Black Organization. Was Takasugi also transported with him? How many headaches can Conan withstand until he loses it? And most importantly, does the author suck at summarizing? Just read the story please. If you don't comment I'll be sad :(

Cover found through anele on Zerochan