Chihiro Takamiya

An exceptional marksman and hopeless playboy, private eye Ryo Saeba reluctantly forms an alliance with his late partner's sister to investigate his death.

Kenji, who works alone, meets a young woman on his way home from work who is an AI robot who calls him "master". To avoid making his wife jealous, he suggests that If the robot looked like his mother there would be no way that she would have an issue.