Pass Through System Customer Service

A story about a time-travel system customer service who, in various time-travel worlds with different backgrounds, becomes an adventurer and guide, helping a time-travel rookie become a legend and reach the pinnacle of life. Helping customers reach the peak of life is the mission of the customer service team of the Time Travel System. Improving the customer's time travel experience is the purpose of the customer service team of the Time Travel System! Ps1: This is a story about the protagonist taking care of his little brother while traveling through the world. Ps2: I am not just a stranger, but I also have a role to play.