I Became the Self-Sacrificing Female Side Character

The first plot is well written, but the later plot is just inexplicable, a bit of a catch-up, so try to avoid the lightning.

It's a genre I've never seen before, and I'm very curious about the story behind it. The previous plot may be foreshadowing, so I was a little confused at first, but as I watched later, the character of the heroine gradually became clearer. The writing style is considered a light-hearted time-travel drama, and there are some homophonic jokes, so don't watch it as a serious drama. When she was a child, An An was very domineering and playful. The system is also very interesting, with very few scenes and can be ignored. I don't know who the male protagonist is yet, so I'll look forward to it.