Wear Books and Dress up as Female Accessories

The heroine travels to a rebirth novel and becomes the heroine who is destined to meet in the story. She is already married to the male counterpart who is obsessed with the original heroine. There is no cheat code, no system, and only a little foreknowledge of the original plot. As an ordinary person who is greedy for modern technology and wants to escape from his current life after finding that there is no hope of returning home, how should he deal with it? It's a slow-burning novel, from a first-person perspective, with CP (1VN). It doesn't slander the male and female protagonists of the original book, and it's not pure love.