I Started Looking for My Sister, but Ended up Finding the Strongest Witch.

In the xxx3rd year of the old calendar, the war against witches changed the structure of the entire world, and the ancient witch clan was almost wiped out... In the year 999 of the New Calendar, Kyle returned home from hunting and found that everyone in the village had disappeared, including his dependent sister... "Sister, where are you..." One day, a sleeping girl in a ruins opened her eyes. Due to her long sleep, she knew nothing about her past... "Who am I..."