What? The Crown Prince Is Pregnant!偽りの皇太子さま; The Crown Prince Is a Princess and Is Pregnant!; Your Royal Highness is Delighted; Taizi Dianxia Youxile; Su Alteza Real es feliz

The crown was invited to attend the Prince Regent's birthday banquet, but it was the last place he wanted to be in this world because he had arranged an assassin to take the Prince Regent's life. But the Prince Regent was way too cunning. No doubt, the assassination plan was failed. There's only one way to achieve his goal – the crown prince decided to do the job himself! Disguised as an assassin, the crown prince sneaked into the Prince Regent's chamber, only to find out…