Vivi and The Magic Island

Sequel to the video game 'Alps and the Dangerous Forest,' this time we play as Vivi, a beautiful swordswoman. One day, they receive a smoke signal from a remote island, prompting Vivi, accompanied by her teacher 'Lolo' and company, to head to that location... Upon arrival, they are amazed by the beauty of the island and a strange aurora. Both decide to explore, facing dangers. Vivi encounters many threats and is separated from the group; however, she manages to reunite with her teacher... who makes contact with a woman named 'Monaca,' who is sad because her little sister is missing... With that in mind, what mysteries does this island hold? Where is Monaca's sister?