Detective Conan: Edogawa Kobei

An ordinary high school student from the 21st century gets caught in the crossfire after witnessing a gang shootout.

His soul transmigrates into the world of Detective Conan.

And he ends up looking exactly like Shinichi Kudo.

Luckily, he has a System, or how else would he make it in this world?

A famous assassin who looks like a child but has an astonishingly sharp mind: Edogawa Kobei.

Note: The male lead's CP is Sharon Vineyard (Vermouth). Aside from a few important plot points, the rest is all made up.