Transmigrated Into a Book in the 1970S, My Villainous Husband Is So Sweet

She is the doomed minor character in a book who takes the heroine's place in the countryside. Naturally inclined to slack off, she is forced to work hard if she wants to stay alive. She takes on the heroine, battles one nasty character after another, earns foreign currency, gets into university, falls in love with a handsome male youth sent to the countryside, and works to make her country shine. She builds up her hometown and serves her country. She is a role model for the people! Wherever she goes, she is the true leading lady. Then she unexpectedly learns that her refined and gentle boyfriend is actually the book's villain, the most ruthless man of all. Her poor little heart trembles… He is her handsome boy-next-door, tall and broad-shouldered, strikingly handsome. In his previous life, he grew deeply disillusioned with the world after everyone turned against him. Unable to heal the wounds left by his mother's childhood abuse, he remained alone his entire life, with no wife, children, or family. He died suddenly, and all his immense wealth became an inheritance for the woman who had given birth to him but never once fulfilled her duty as a mother. His hatred was so intense that he was reborn. The chattering little girl makes him feel a warmth he has not known in years. Without realizing it, he grows willing to indulge in it. He is truly sick and tired of wealth and possessions. All he wants is to marry her properly and lay every beautiful thing at her feet. Their home is filled with birdsong, flowers, and the gentle sound of flowing water. He also wants to tell the world: He has a family too, people who care for him and cook for him. Everyone else: Is she a silly girl? She's clearly an abacus come to life!