A story about ordinary teenagers and a deserted girl trying to find their way home together in a strange world. There will be stalks from other works intermittently, non-malicious stalks are very important to the plot, Very important, very important. No harem, there are hooks, a little bit, not much (two mechas that are not in the original book, etc.), not super technology, not black technology. The description of the characters in the original book is for the author's own understanding, and different opinions are allowed, but Don’t cheat. Don’t cheat. You are right. You can make reasonable suggestions. The author’s mentality is fragile.