Ranma has rejected the amazons too often, so Cologne slips him and the Tendo’s some mermaids flesh. The Tendo’s all turn into monsters that Ranma has to kill. Ranma turns into an immortal who is imprisoned by wards on a mountain to prevent him from exterminating the amazons. He is visited by the residents of the Hinata sou and accidentally released, so he goes to live with them. (Love Hina Crossover)