In Konoha, I Keep Mistaking People for My Little Brother

My other story, The Whole Shinobi World Covets My Wife, is now underway. Please check it out.

Sagawa Ikuka, the adopted daughter of the Uchiha clan head, was killed by her younger brother.

"...Once I've taken care of everything, I'll go to the underworld and atone to you, Sister." Back then, her younger brother knelt down and kissed her forehead with his cold lips.

"Please wait for me. Didn't we promise? Even in the underworld, we'll be together."

Sagawa Ikuka: ...?

You're going to atone to me after I'm already dead? What the hell is wrong with you!

Just as she was getting ready to reincarnate, after crossing the Sanzu River, King Enma suddenly told her that her ties to the world weren't over.

Sagawa Ikuka: Are you kidding me?

*

Sagawa Ikuka woke up, covered in wounds and completely confused, in an unfamiliar place.

That's right, she'd lost her memories and transmigrated.

Fortunately, she hadn't forgotten her most valuable skill, and barely managed to stay alive.

In a daze, she struggled to survive in this world while searching for the memories she'd lost.

Then one day, Sagawa Ikuka accidentally saved a ninja, and the sealed doors to her memories finally began to open.

"My little brother," she murmured.

That's right. She was supposed to have a younger brother.

So Sagawa Ikuka chose to make a deal with the ninja, offering to work for free in exchange for a chance to regain her memories.

This should have been a purely practical arrangement with no feelings involved.

Until later...

The gentle, well-mannered ninja retched up a pool of blood. The corners of his eyes were as red as if touched with rouge, and a few tears clung to his lashes. Looking utterly wronged, he asked, "...When you look at me, who are you seeing?"

Sagawa Ikuka was speechless.

Hey, don't sully our purely financial relationship with feelings!

Just as Sagawa Ikuka resolved to explain everything properly, fate had other plans. She regained her memories and returned to her original era.

Before her mind had caught up, she called the little brother she'd been searching for by the ninja's name.

Oops.

Seeing her little brother's face grow darker and darker, his expression full of fury, Sagawa Ikuka suddenly felt a little guilty.

Now she had to deal with:

Brother Number One, who rebelled and killed his sister.

Brother Number Two, who kept asking who she had mistaken him for.

Brother Number Three, who claimed he fell in love with her at first sight.

And the reanimated dead.

The ninja who had been reincarnated across from her looked thoughtful. Smiling gently, he pointed to the person behind Sagawa Ikuka. "I see. So you've always treated me as his substitute, Sister?"

"That really does make your little brother very sad."

Well, this is a disaster, isn't it?

[Reader's Note]

1. The heroine is irresistible to everyone. Mary Sue, melodrama.

2. Loads of original settings.

3. The author's writing ability is limited, so the plot has some holes. Please don't attribute the story's plot to the original characters. Read rationally.

Theme: She will become a better version of herself