1x10 - Ranma ½ OAV

A thousand years ago, an evil ogre was sealed away in a box by a Monkey Priest. Temple priests have watched over the box since that day, but the seal that secured the box is now fading away. The current priest has reached out to Ranma, Genma and Soun to help him replace the seal. Unfortunately, the new seal is ruined, and the creature is released to wreak havoc once again