"...I can live, can't I?" Flam, who was chosen for the hero party despite having zero ability points, possesses only a mysterious power called "Reversal." As expected, she is of no help in battles, but she continues to work hard for the party without losing heart. However, Gene, the renowned genius sage, finds her annoying and bullies her at every opportunity, eventually selling her off to a slave trader. In the slave trader's company, Flam is mistreated and is about to become prey for a vicious monster as a form of entertainment. However, the moment she wields a "Cursed Great Sword" that melts the body into sludge, her life undergoes a dramatic "Reversal." When the curse transforms into a blessing, despair is reversed— A dark light fantasy woven by a girl and another girl finally makes its debut!