They're twins

"Mrs. Itadori, both of the twins you're carrying are perfectly healthy!"

In an office at the hospital, a female doctor in a white coat smiled as she congratulated the newlyweds who had come in for a prenatal checkup.

The country's birth rate had been falling steadily in recent years, so the doctor was genuinely happy for this mother-to-be carrying twins.

The doctor glanced through the medical chart. This was the expectant mother's first pregnancy, too. The delivery would likely be hard on her.

"T-twins?"

Kaori Itadori wore a beige, high-necked knit dress, giving her an air of gentle competence, but the doctor's words made it difficult for her to maintain her warm smile.

As though she had heard something she should never have heard, her voice trembled slightly.

"That's right. Look, you can see both babies here."

The young doctor took out the ultrasound images and traced the babies' outlines for Kaori Itadori. At the sight of those unmistakable shapes of two children, Kaori froze.

The doctor thought she might be afraid of the pain of childbirth and offered a few soothing words. Meanwhile, Jin Itadori stood beside her, grinning so broadly he couldn't close his mouth, every bit the doting father.

Seeing him like that, Kaori's expression darkened slightly.

Kenjaku was a Curse User who had lived for over a thousand years.

Several days earlier, he had used his Cursed Technique to take over the body of this woman named Kaori Itadori.

No one knew the inner workings of this body better than he did. One reason he had taken it over was the Itadori family's unusual bloodline.

He intended to experiment with this body and give birth to a vessel for Ryomen Sukuna, the King of Curses. He had succeeded, and in a little while, that child would be born safely.

Prenatal checkups had never even crossed Kenjaku's mind. Had the neighbors not spent the past two days saying that failing to get prenatal checkups and open a maternity record would make it difficult to register the child's birth later, and had Wasuke Itadori and Jin Itadori not nagged her every day to get at least one checkup, Kenjaku would never have made this trip to the hospital.

Yet he had never imagined that this seemingly unnecessary visit would reveal that another child had suddenly appeared inside the body.

As far as Kenjaku was concerned, that was utterly impossible.

"Kaori, the doctor just told me both babies are healthy. But delivering twins will be difficult. You're going to have a hard time..."

After they left the hospital, Jin Itadori took his wife's hand with heartfelt tenderness.

He truly felt for his wife, Kaori.

Several months earlier, his wife, Kaori Itadori, had inexplicably returned from the dead. His father, Wasuke Itadori, thought something was wrong with her, but Jin disagreed.

His Kaori had always been the most beautiful, gentlest woman.

And now his Kaori had given him two children.

Soon, their family of four would be living the happiest life imaginable...

"It's all right, Jin."

Kaori smiled faintly and withdrew her hand from Jin's palm.

"Kaori, let's go out for a nice meal to celebrate!"

Jin paid no mind to Kaori's rejection. He draped an arm over his wife's shoulders, hoping to treat her to a fine Western meal with his spending money.

In most households, husbands were expected to hand over their paychecks, but his wife, Kaori, had always been considerate of him and never even asked for his salary card. Jin was deeply moved by her love for him.

"No, Jin. My stomach doesn't feel very good. I'd like to go home and rest."

With little interest in celebrating, Kenjaku removed Jin's arm.

All he wanted now was to return to his laboratory and find out what exactly was happening inside this body.

Aside from the intended vessel, where on earth had the other child come from?