Cupid's Last Wish

When awillis a cause of conflict and becomes Cupid's Last Wish, a young man whose soul gets swapped with his sister after an accident must set off a journey to get holy water from 4 temples within 7 days in order to swap back to his body. His companion to this quest is his former best friend, who is now his foe. A twist of fate has somehow tightened and mended their relationship while searching for the holy water across the country. Apart from the quest, he needs to protect his farm from the two evil relatives who wish to take all the assets of his family. Find out how the story unfolds and see if the journey can forever change their relationship. Why does the will that creates a conflict is called a Cupid's wish?