[The city + the system always wants to physically destroy the protagonist + the cute agent from the protagonist's time period + the senior sister is a little yandere + daily life is a little sweet and a little salty + how to make the production awesome and high-tech]
First, the bad news.
As an agent, his identity was exposed in hostile territory. Fortunately, he had a pistol instead of a rifle and happily committed suicide.
Then, there's good news.
He traveled through time and was reborn into a parallel world with the same general structure as Earth. People here call this planet Blue Star.
Then, there was good news. Not only did he travel through time and be reborn, he was also reborn as a second-generation rich man with the same name.
Then, there's bad news.
He... His family is bankrupt.