Will We Be Together for the Rest of Our Lives?

Everything is calculated, or perhaps, this is a game. But if God closes a door for you, he will definitely open a window for you. Everything he had planned so well was shattered by his memory. It turned out that he had just traveled through the book. However, he seemed to have forgotten something. When did the male protagonist follow him into the book? Hey, I actually got married when I returned home. What a surprise.