My Undecipherable Deep Affection

Five years ago, she saved him but lost the most precious thing a girl could have.
Five years later, he descended from the heavens to protect her peace and guard her safety.
Yet, she said, "I'm sorry, but we're not familiar."
He smirked, "I know about the birthmark on your body. Wouldn't you say we are familiar?"
She harbored secrets, feigned weakness, and endured for many years. While she abided by the world, she was cold and evasive towards him.
He held a high social status, controlling everything around him. He was cold-hearted towards the world, yet only tender down to the bone to her.
Until one day, he pulled the little guy who was hiding behind her, "Stealthily making a miniature version of me and you say we're not familiar?"
A small treasure stood in front of her, blinking and staring at him, "Mom said I popped out from a stone crack!"