My Arch-Enemy and I Brought Our Kid Along

At seventeen, Jian Shiyi comes from a wealthy family, excels at school, and has almost nothing to worry about.

His only headache is his hated rival, Shan Mingli, who keeps competing with him for the top spot in their grade.

His life is peaceful and uneventful until one day, on his way home from school, a boy about his age blocks his path.

The boy grabs him by the collar and says, stern and fierce, "Jian Shiyi, I'm your son. I've transmigrated here from the future to warn you."

"You absolutely must not fall in love with Shan Mingli!"

"He's a jerk. He'll dump you someday."

Jian Shiyi: ?

Jian Shiyi's eyes widen in shock. "How could I ever fall in love with that idiot Shan Mingli!?"

"I knew you wouldn't believe me."

The boy sighs as if he's used to this. "That's what you said the first eighteen times, too."

--

To stop Jian Shiyi from falling in love with Shan Mingli, Jian Dan has tried nineteen times.

This time, he came closer to succeeding than ever.

That is, until he sees Jian Shiyi, who swore he would never fall for a jerk, making out with Shan Mingli in the stairwell behind his back.

Jian Dan: ...I really want to bundle these two hopeless romantics up and throw them away.

--

"Let's not stay here. Come with me back to when we were eighteen. We'll hide beneath the azaleas and make sure fate can't find us.", Jian Zhen, "Come Take a Walk with Me"

--

A school story about a family of three, titled "Weren't You Two Mortal Enemies? How Do You Already Have a Grown Kid Behind Our Backs?"

The title, blurb, and names may be revised, but the core family-of-three premise will stay.

A stubborn but softhearted, tsundere rich beauty as the bottom; a poor boy who looks aloof but is actually a selfless saint as the top; and their genius youngest son, who exhausts himself worrying over his two dads.

At heart, this is a healing story.

Theme: Work hard to change your fate.