Although we were able to add the target function with the script attached to the camera in order to set the target originally, the collider element of cinemachine was often used to avoid it because of the building and terrain. I'm trying to use it, but it doesn't work well because the camera settings change.
By the way, I added the target function to the parent that is an empty object of the camera instead of the main camera. Include any program requests.
Thanks for your answer.