Fukushuu no Makenshi Selma -Inju ni Otoshi, Haitoku no Nikuato o Sono Mi ni Yadoshimono- by Atelier G/H - Adult Sex Game

Selma, the leader of the Knights of the Kingdom of Avria, is forced to use a sealed magic sword when attacking a demon, but is cursed.
She is robbed of the princess's body by a demon.
Selma, who was disqualified as a knight because of that blame, along with a magic sword that could not be parted with a curse as a female swordfighter.
She wanders for clues to the demon who took away the princess's body.

Selma tries to gather information by arriving at Torx, a city rumored to have seen a demon.
However, he claims to be a vigilante in the city and gets entangled with rogues.
Selma heads for the hideout, pretending to follow what the rogues say.
When he beats the rogues and asks about her vigilante, the existence of a female warrior who binds them is revealed.
Selma, who felt suspicious about the female warrior,
She infiltrates the mansion of a powerful man whose female warrior is invited as her diners ...