Black Killer Whale Baby

“Hey, mister!”
One day, a small killer whale appeared before me.
“Do you know where the educational institution is? I need to go there.”
“You’ve taken a wrong turn, quite a ways back.”
This seems to be my daughter.
“What are you looking at, mister? Want a bite?”
She doesn’t seem to know I’m her father.
* * *
…Is that what you thought I’d be thinking?
If so, you’re dead wrong, old man!
My name is Calypso.
A fourth-time regression.
While others live comfortably after being reincarnated into books, my life is ruined.
To make matters worse, I’ve been reincarnated into a child-rearing story!
In my third life, I faced a total annihilation ending!
‘You crazy male leads obsessed with this female protagonist!’
That’s right.
For some reason, no matter what I do, I regress before reaching my 22nd birthday.
However, in my third life, when the dragon went berserk and brought destruction, I accidentally discovered something.
When a dragon goes berserk, it distorts dimensions!
Could I use that to return to the home I used to live in?
In my fourth regression, when I returned, I decided to use this dragon.
Father? Brothers? They’re all just stepping stones to meet the dragon!
“Wait for me, Lord Dragon!”
[A female lead who’s tired of dying but has gone crazy from repeated regressions X A dragon duke bound by a mistaken contract with the imperial family / Child-rearing story / The female lead’s slightly insane family / Have you heard of survival of the fittest? / The strongest at the age of three / They think they’re a happy family raising children]