7004 Book(s) Related to the yakuza's guide to babysitting manga

They gave him 24 hours to hand over the girl.
He gave them 30 seconds to regret .

Jack Cole was supposed to be nobody—just another quiet college student.
No records. No past. No trace he ever existed.

But when a powerful family tries to take his cousin as part of a dirty deal…
and a billionaire heiress becomes the target of a professional kill team…

Something buried comes back.

The campus?
Just his cover.

The truth?
He’s a weapon trained for war—
the kind governments deny, and enemies never see coming.

Now the richest family in the city wants him dead.
A private army is moving in.
And a global biotech empire is pulling strings from the shadows.

They think they’re hunting him.

They’re wrong.

Jack isn’t running.
He’s choosing who dies first.

Six months ago, a yacht explosion consumed everyone I loved: my husband Leonard, my parents, and my brother.
I escaped only because of stomach pain that kept me from boarding. My adopted sister Claire became the sole survivor.
Since then, I've become an empty shell.
Even after being diagnosed with terminal uterine cancer, even while carrying my late husband's child, I've endured the agony of chemotherapy alone, exhausting what little strength remains to scrape together money for Claire—who hides away in a private care facility, claiming severe PTSD.
Until this winter day, with a blizzard approaching.
Dragging my dying body to my husband's memorial to pay respects, I discovered a credit card statement—charges made three months after his death.
Following the address on that receipt, I pushed open the door of a luxurious suburban villa.
Inside, it was warm as spring. My parents and brother, who should have been at the bottom of the ocean, stood there perfectly alive.
At the center of the room, my husband—the man I'd grieved for day and night—was kissing my adopted sister, his lips tender against hers.
The whole family was celebrating, raising glasses to toast the infant cradled in Claire's arms—barely a month old.
There had never been any disaster at sea.
It was all a meticulously planned hoax—their twisted way to erase me from their lives forever.

I was driving my dad's luxury car to pick up a friend when his secretary stopped me on the spot.
She mistook me for the lover who had sex with my dad in his office.
So she used car theft as an excuse to drag me into the basement, beat me up, and took nude photos of me.
When my dad found out, he asked me to apologize to her.
That's when I realized that in his eyes, his reputation mattered more than his own daughter.
If that's the case, he doesn't need to be the figurehead CEO anymore.

On a stormy night, a horrific crash unfolded on the overpass. The victim was brought to the city forensic center.
My husband, Ethan, slipped on his gloves and expertly examined my shattered body, his voice detached. "Record this: Female, approximately twenty-five years old, suffered severe trauma before death."
His assistant sighed. "That's rough. Not a single family member showed up."
Just then, the assistant slid a misshapen silver band off my mud-streaked finger.
"Sir, this ring... isn't it identical to the one you keep in your desk drawer?"
With a sharp clatter, the scalpel slipped from Ethan's hand and hit the floor.