This is the Republic of Roslesia. A nation home to many adventurers. Adventurers are ranked from the lowest, F, to the highest, SSS (Triple S). They strive daily to complete guild missions and climb the ranks.

Allow me to explain the ranking system.

First is F-rank, the starting point. High-rank adventurers view them as useless failures. As the lowest tier, they are often treated like slaves by arrogant adventurers or nobles. To escape this, one must rise up alone or desperately gather allies. E-rank is one step above F. Slightly better, but treatment remains largely the same. D-rank is where people begin to offer a modicum of recognition. Work increases, but discrimination is still rampant. C-rank is the level where one can finally recruit allies. Discrimination noticeably begins to fade. B-rank is widely recognized as a sign of growth. Adventurers here can take on high-rank quests and, with training, rival A-ranks. A-rank is the mark of a full-fledged professional. S-rank denotes power beyond A-rank, capable of slaying high-rank monsters alone. They are hailed as Heroes. SS-rank is vastly stronger than S-rank, capable of wiping out hordes of high-rank monsters single-handedly. They are known as Great Heroes. SSS-rank is said to possess power equal to the gods. There are only ten in the entire world. These ultra-elite adventurers surpass even heroes and are spoken of as Legends.

Enough with the explanation. Let us begin the story.

Among the many adventurers, Guest belonged to an S-rank party. One day, Guest is suddenly summoned by the party leader. The other four members are also present. The leader makes a declaration.

At that moment, to everyone's shock, Nemu, Rei, Viole, and Fuuka all announce their resignation from the party.

The reason is simple: they all know that Guest isn't actually C-rank, but SSS-rank. Furthermore, as Guest's fiancées who adore them, they have no intention of being separated. They decided it was far better to follow Guest than to stay with a useless weakling like Allen.