Undercover Girlfriend is a free simulation game developed by Genius Studio Japan Inc. for the Android platform. In this game, you play the role of a veteran private investigator in New York City, and your investigation takes a dangerous turn when a beautiful woman shows up outside your office. As you dive deeper into the case, you discover an assassin sent to stop you. Can you solve the mystery and stay alive?

The game features three main characters: Lana, the frenzied beauty searching for her missing sister; Claire, your headstrong colleague who wants more than just a professional relationship with you; and Hazel, the cold-eyed assassin sent to take you out. The decisions you make throughout the game will determine the outcome of the story. Will you be able to solve the case and win over the hearts of the characters, or will you meet a tragic end?