People are in Star Rail, but all the people are NPCs?

Story of: People are in Star Rail, but all the people are NPCs?[Day 1, I, Lin Ze, the time traveler][Good news: I have traveled to the Starry Sky Train][Bad news: Everyone except me is an NPC][Did I gain the ability to be a transparent human after traveling through time? 】[The next day, I found out that they were really NPCs. After the experiment, I found out that Sister Jizi was very smooth][On the third day, I discovered that there was not only the Star Train, but also Hyperion and Teyvat. I was doing something greedy.][Day 4: Ningguang really knows how to enjoy herself][Day 5, Fu Hua is not as big as me, but harder than me][Day 6, Fu Fu is so cute, Fu Fu is so pitiful at night][Day 7, Big Duck is really big]…………[Day 30, is there really no one here? If you don’t come, I will let myself go]