Caught by the Villain

Story

A lifetime as a fencing prodigy prepared Eunha for her new role as Selena Evan, novel side character and daughter of a renowned swordsman. Life isn't actually so bad after being sucked into a fictional world, but she’s doomed to meet an untimely death if she can't escape the clutches of the villainous Prince Ignus. When Selena's twin brother, Celestine, runs away before his military conscription, she has no choice but to enlist under his name to avoid getting her entire family executed.

Synopsis via AniList (English).