There is a little girl named Ginny who is about 11 years old, and Tom is her good friend (wan) and companion (ju).
Every morning when Ginny wakes up, a new world awaits her, and something completely different from yesterday will happen.
For example, when she entered school, she was still a Gryffindor, and the snake house and the lion house were still in love and killing each other. When she woke up the next morning, she would find that she had become a Slytherin, and the snake house and the lion house were in love and in love with each other.
For another example, she saw the ambiguous relationship between Hermione and Ron today, and when she woke up the next morning, she would see that Hermione and Blaise were a couple that everyone envied...
Another example is that the first and second generation Dark Lords were originally the big devils that everyone shouted to beat! As a result, she just woke up from her sleep at night and found out that the first generation Dark Lord married Dumbledore and became the Vice-Principal of Hogwarts, and the second generation Dark Lord married Abraxas Malfoy! ! !
Fortunately, she still has a companion (mei) who remembers these daily weird things with her, that is Tom, the soul piece that was sliced and put into the diary...
Ginny: ... Haha [throw] Takuma's having this is better than not having it at all! I'm not the nymphomaniac in the original version!
As you can see, this is a story about a girl who traveled through time and became Ginny Weasley, who worked hard to become stronger (and stronger) in her daily life.
[PS: The content tags are just for fun]