Outrageous! I Am a Man Going to Be a Concubine for the Prince.

[Two men] [Two women] Shen Changqing, a doctoral student at Tsinghua University in modern times, saves people and travels to a parallel world with a person with the same name. In the beginning, his sister escapes from marriage. The hero marries the prince instead of his twin sister, and starts a ridiculous relationship with the prince and the princess. In the end, I chose the crown prince or the princess. Or do I need both...