1 definition by OhScience

A videogame created by Kikiyama where you play as a girl named Madotsuki. You explore her dream world and collect various effects to help you. This game has been described by many as genuinely disturbing due to the nature of the dreams, but has a large group of fans.
I played Yume Nikki last night and it scared the pants off me.
by OhScience October 8, 2010
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