Ranma ½: Kessen Tougenkyou! Hanayome wo Torimodose!

Ranma and the gang are invited to a boating trip with Kuno. Unfortunately, a storm destroys the yacht and everyone is stranded on a remote island. The whole situation goes even more awry when one by one, the girls disappear without a trace. Ranma then finds out that the girls are abducted by Toma, ruler of the island, as part of his personal harem. (Source: ANN)After the whole Ranma "crew" has stranded on a deserted, tropical island, suddely the girls start disappearing into a strange shadow. What is happening to them and will they be saved?