Curse of the Vengeful Tongue

Summary

Read Curse of the Vengeful TongueA mismatched detective duo hunts down a violent criminal Asahara Gin is a promising young detective with unparalleled physical abilities. However, after a certain incident, he ends up entering into a master-servant contract with a senior detective, Mera Shusui. A contract was made to cooperate in "collecting criminal blood" in order to arrest the worst serial killer, Z