A Big Shot Who Pretends to Be a Newbie

(Rebirth of a master + wish fulfillment + mecha + hidden identity + one heroine + live-in son-in-law + saintly protagonist) Lin Feng is reborn and discovers that he has become a timid live-in son-in-law, looked down on by everyone. Familiar with the world and his own dire circumstances, including his frail body, harsh living conditions, and indifferent wife and her family, he is soon subjected to the usual humiliations: taunted by relatives his age and mocked by outsiders. The protagonist reveals a hint of his true abilities, retaliating with cunning, or force, and causing a minor stir as the heroine shows a flicker of surprise…