I Raised My Younger Sister Beautifully

I Raised My Younger Sister Beautifully summary:

The imperial family collapsed during one night by the basilisk, the summoned beast of darkness which was summoned by the cursed princess, Fleta. “If there is a next life, then… Can I really be your younger sister?” If I had approached you a little earlier, would it have been different from now? The last time everyone regretted it, the time miraculously returned to 6 years ago. If this is the second chance we've been given.