The Poisoned Footless Bird (2020)

I recommend this both drama because , Male lead and Female lead
try to solve problem
In one drama explosion and another student murder/suicide

Part 3 of the trilogy.
Same director and the story revolves around drugs.
Link to the 3 parts: https://v.qq.com/x/cover/mzc00200r1xde9u/h00344910n4.html