Ou-sama Game

1-4: King Game
Renge, second prince of our favorite royal family, is sent to a neighboring country as collateral in a foreign relations deal. When things turn sour between their countries, he becomes a virtual hostage of a tyrant King, Ouga.

5: King Game: Sixth Prince vs. Third Prince
Homura, third prince, fell in love in his brother, the sixth prince, Airi, when they were kids. The younger prince was very sickly at that time and his brother started to learn medicine (with poor results) in order to heal him. Now they are grown up, they are lovers (by name only) and Airi is bigger and no longer sick or weak, but not in Homura's eyes. The sixth prince decides to change that.

6: Kaizoku Game: Pirate vs. Fifth Prince
Fifth prince Yuuri tried escape from the castle and ended on a pirate ship belonging to Kuuron. From this pointn the young prince starts living on the ship and being the captain's "woman".