It tells the story of the heroine Alienade who slowly begins to develop with Snape after passing through the book.
Because of the heroine's condition, she committed suicide on a quiet night. When she woke up, she found herself on a very familiar train, looking at the scenery outside the window and the people around her.
"???, Is this in "Harry Potter"? Ah... It's actually here... Then I have to practice the things I wanted to do but couldn't do before! I want to make a big change so that he can live until the end, or... Forever..."
In the days that followed, she discovered that her illness had followed her here...
Purpose: I feel that Snape's ending is a pity