Dual Transmigration: The System That Exists Only to Continue Your Story

It seems like transmigration, but in reality, the male lead is a scientist who spent nearly a century building a System so he could meet the female lead.

The male lead had a crush on her for three years in the modern world. Later, she died at the age of thirty.

After being reborn, the female lead returns to age sixteen. She has loving parents who have quietly done so much behind the scenes to protect her. Then she meets the male lead. They become entangled, grow together, and come to understand love, family, and friendship.