Secret Investigator Codename Canary's Last

Secret investigator. Sometimes they must even shoot their allies in order to carry out their mission. Codename: Canarya, Rumi. Her flaw is that she is too kind. In this world where momentary hesitation can be fatal, Canary's kindness was fatal. Kabura, a senior investigator and girlfriend, is fired by the Canary. Canary begs for one last chance, and asks for marriage so that he will become his wife after the next mission...