So, im curious now, the "dream manipulation" means we will be able to take others there right? Or essentially have our own "dream prison"? If so, i cant wait to "get revenge" on rinny
Well, this is half a spoiler, I guess. I was translating the game, so I saw a dialogue related to this ring. Where it is is unclear, I can only guess. For example, it may be found in the horror shop, behind the second locked door. Or in the manor behind another locked door.
By the way, the "marriage" with Rinny is most likely also a bad ending.