RBK-061 The spy went on a mission alone and it ended

Perform quests as long as you have lives. You have to survive even if you are treated like a dog. That's the job of an undercover investigator. Sakura accepts a marriage proposal from her senior, Aoki, and decides to retire after a year. …This was supposed to be the final mission. However, this is the last mission for the two of them.

RBK-061 The spy went on a mission alone and it ended