Looking for a Quick Transmigration Story That I Think Used to Be Called Villain Development Plan

I’m looking for a quick-transmigration story. In one world, the heroine is a sword spirit who saves the hero when he’s young and raises him. He later becomes a great general. At one point, she returns to the sword for three years. In another world, the hero and heroine live across the hall from each other, and she saves him from having his legs broken.