(Harry Potter) Between Night and Day

Davilaide Evans is a well-adjusted, mentally ahead-of-her-time model student from the 21st century, a notorious chatterbox, a midnight study thief, and a professional laboratory menace. One day, she and her best friend Christine stay up late studying in secret, leaving them both dazed the next day. In the lab, they set off an explosion with a tube of unidentified reagent and happily get blasted unconscious.

When she wakes again, she doesn't see the wrecked laboratory. Instead, through a narrow crack of light in the pitch black, she sees a black-haired man holding a woman and weeping.

That one glance binds their lives together forever.

Amid towering flames and crumbling walls, she makes her choice in just a few minutes. She steps out of the darkness and takes responsibility for what is hers.

"Don't be afraid. This time, I'm by your side."

As the saying goes, genius is just a step away from madness.

In Davilaide's case, you could say she's a little bit of both.

The same goes for her little group:

Christine, a Slytherin heiress with an uncanny rapport with Davilaide; Ivy, a Ravenclaw who loves to run her mouth; and Cedric, a famous Hufflepuff heartthrob.

Their bizarre cross-house friendship is unexpectedly stable, and the four of them are equally talented and in sync when it comes to getting themselves into trouble.

What a very Mary Sue-esque lineup.

A coming-of-age drama with a happy ending. There are clues and easter eggs hidden in the chapters for readers to figure out and discuss in the comments. See how a driven East Asian overachiever from the peaceful 21st century joins forces with others to change the ending. The story includes the heroine's discussion of conflicts in wizarding society, and the later chapters depict the Second Wizarding War from three perspectives.

"Regret is an inevitable part of life, no matter where you are."

"Three different branches sprang from the same bloodline, and each branch carried on in its own way."

"The first branch was cursed by the gods. He was the strongest of the three brothers, yet spent his whole life tormented by love."

"The second branch was both the luckiest and the unluckiest. He lived in the shadow of his brothers, but his life was peaceful and smooth."

"The third branch gained and lost in equal measure. When dawn came, he sounded the trumpet of victory for everyone."

Main pairing: Davilaide x Snape (more prominent from the Order of the Phoenix arc onward)

Side pairing: Davilaide x Cedric

Davilaide: Come on, let's check off the things every transmigration-story heroine has to do: sneak into the Forbidden Forest at night, cook hot pot in a cauldron, and dance in the professors' danger zones. And we're the first transmigration-story heroines to eat McDonald's at Hogwarts!

So, can we change the original ending?

Theme: Regret is an inevitable part of life