Jiraishin

Kyoya Iida is a hard-nosed detective from the Shinjuku Police precinct. He is known in the force as an unreasonable type who would use lethal force to solve cases, making him unpopular with the enlisted and high-ranking officers in the National Police Agency.
Despite this, there are some in the force who admire Iida for his bravery and cleverness in using lethal force to solve criminal cases whenever legal means are met with a dead end.