Qin Ming traveled through time!

Came to Japan and became a boy named Yumiya Akira

He was shocked to find that the original owner, who had just finished the college entrance examination, gave up the opportunity to further his studies in college and resolutely took over the detective agency of his recently deceased father.

The name of that university is Didan University.

And the address of that detective agency is 3-25, Yoneka-cho...