Good Morning, Sleeping Lion

The series follows Kazuma Kujo, who recently joined an entertainment company as a manager at the age of 50. He was assigned to idol Reimi Watanabe (played by Hinatazaka46's Miho Watanabe), who one day decided to fulfill her dream to become an actress by auditioning to a popular drama. But there are some issues as a mysterious group known as Grim Reapers are after Reimi's life. Can this middle-aged manager with a declining stamina protect his talent from those harming her? Can Reimi pass her auditions? Also, what is Kujo's true identity and why he chose this job?