Detective into aot /Detective Conan x Aot crossover/ Conan as Eren

On a normal day, Conan and Hattori were walking, just chatting about random things when a portal opened from the nowhere sucking him in. He woke up more than 700 years in the past in a world where there were strange creatures that were named titans... and they ate people. He met Ran from that world, and his mother and father too but they were slightly different. How will Conan survive there? Is he ever going to go back to his era?
Is someone from his world going to come too eventually?

Ran x Shinichi/ Conan at one point (no smut, only platonic)
Gore warning
Death warning
Panic attacks/ anxiety