Reborn In The Apocalypse: It Had Always Been You - Chapter 3

[Cute Baby • Sweet & Satisfying • Contract Signed]A missing billionaire lands—half-dead—on her couch.Five years earlier she crawled out of a fire her own blood set. Now she’s back, four-year-old sidekick in tow, to save the stranger she found on her doorstep.He looks harmless, eats her snacks, then—snap!—shreds the white-lotus neighbor, gifts hugs, kisses, and a life that suddenly runs on easy mode.Wait a minute, why are those people respectfully calling him CEO…?!

Kitazawa’s grades at the Ninja Academy had always been mediocre.Uchiha Itachi graduated at seven; he barely scraped through at thirteen.Uzumaki Naruto became the savior of the ninja world at seventeen; at that same age, Kitazawa was still struggling to make Chunin.In this harsh world of shinobi, Kitazawa was what people called a fodder ninja: no talent, no bloodline, and no backing.To stay alive until the story’s grand finale, he’d chosen the safest path—teaching at the Ninja Academy, a job he’d held for five years.“Another peaceful day in Konoha.”Kitazawa rose from his seat and walked to the window.It was enrollment day again, and the training grounds were buzzing with life.He glanced down at the stack of new student files in his hands. Names leapt out at him, all too familiar:Uzumaki Naruto, Uchiha Sasuke, Hyuga Hinata, Ino Yamanaka, Sakura Haruno, Akimichi Choji, Nara Shikamaru, Inuzuka Kiba… and more.'DING''Host has reached age six and successfully enrolled in the Ninja Academy.''Activating the Strongest Shinobi System.'

The two faced number one female spy transmigrates to a different world and becomes an outrageous idiot girl. When she woke up, what she had to face was consecutive blows of the decline of her family clan, her crippled martial skills, and her disfiguration. To protect her family, she must obtain the treasured book, obtain outstanding achievements, summon a dark beast army. Wait and see how in this unfamiliar, dark magical continent, she dies and becomes a demon then steps up to the top, making all of the formidable people in the world bow down to her in respect.

- Description from Novelupdates

After accidentally falling, she actually finds herself bound to a Second Female Lead Counter Attacking System!