Revenge Princess

She was hurt by her own sister, her family was killed by someone with scheming intentions, and she was betrayed by her own sister. They went to the "Mysterious Island" to train hard, just to get revenge a few years later, and met them after returning home. What will happen if the heroine encounters them on her way to revenge? What will the male protagonist do to the female protagonist if he finds out? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.