Guest was a legitimate member of the royal family, raised as the perfect successor. However, Luciel, who appeared as the King's illegitimate child, snatched the position of successor with overwhelming talent and charisma. Both the King and the people supported Luciel, and Guest gradually lost their place.

Eventually, Guest lost their life. 640 years later—.

Reincarnated, Guest was living as a university student in a university town that developed around the former royal capital.

Then one day, they meet a young man at the university.

That young man was the butler who had served Guest in their past life.

*Settings you don't necessarily have to read

The setting is a peaceful modern European country.
Ragnaria National University, the country's top university, uses the palace once used by the Ragnaria Royal Family as its campus.

The Wise King Luciel Ragnaria, who built the dynasty's golden age, established a school within the royal palace for the purpose of improving the literacy rate of the people. After the fall of the dynasty, the school was expanded to the entire palace. Currently, the entire area around this campus flourishes as a university town.

The King's private chambers, reproduced in their original form, are open to tourists. There, a large portrait of a mysterious figure said to be "King Luciel's brother," rather than the King himself, is displayed. Luciel never allowed the portrait of that person, whose name and history are not even recorded, to be removed from his private chambers.

Claude often gazes at that portrait, which resembles Guest.