Does a JK Have to Save the World, Too?

Saotome Eri is an ordinary high school girl, but one day she suddenly begins transmigrating every night to the Heian era, a thousand years in the past, where she works as a maid for a family called the Ubuyashiki.

One day, an accident leads the eldest young master to realize that she isn't from the Ubuyashiki family.

As he is about to kill her, she blurts out in desperation, "I'm a doctor!"

"I can save you!"

Because of that little lie, she has no choice but to travel back and forth between day and night.

"Um... your body may be weak because you're lacking vitamins. Try taking all these vitamins first."

The vitamins don't work.

"Um... your body may be weak because you don't exercise enough. I suggest you work out for two hours every day."

She gets beaten up, but he still goes running. It doesn't work either.

"Um... your body may be weak because you need strong medicine. From now on, have a ginseng root simmered in soup every day."

He drinks the medicine while throwing up blood.

When she sees him angrily kill another doctor and get ready to turn on her, Eri quickly begs for mercy.

"I'll find someone online to help you."

An unknown young scientist sends her a suitable medicine, and the eldest Ubuyashiki young master really does get better. After that, she is finally freed from her nightmare.

What Eri doesn't know is that, because of what she did, the world now has a thousand-year-old demon king who no longer fears the sun.

Perhaps she wouldn't care even if she knew, because now she has become the target of the cursed king from a thousand years in the future.

Saotome Eri runs crying to her two childhood friends: "Gojo, Geto, help! There's an ugly monster!"

Reading guide:

1. 40% Demon Slayer + 40% Jujutsu Kaisen + 5% Detective Conan + 5% Bungo Stray Dogs;

2. Everyone loves her + group favorite. Eri is super, super, super cute and beautiful.

Theme: The butterfly effect