Young Blood Agency (2019)

set in a similar era. the 2 male leads meet each other and they help each other to solve crimes. has a bromance feel towards the 2 male leads. 1 is an actual detective and the other is just a helper/consultant. they gain popularity through the cases they work.

These two dramas are pretty similar. They're both set in & around the same time period, both detective dramas, similar episode lengths, and cases usually take about 3 episodes to solve. in all in all, if you like detective L, you'll likely like young blood as well