Title screen of ver.1.0.
Himi Nikki (ひみにっき, Secret Diary (Himi derived from Himitsu (秘密, secret))) is a Yume Nikki fangame by Madotsuki-neko. According to the creator, it is a short game that would be followed by other parallel games from different character perspective.
Waka is a music student. For some reason she finds herself terrified to go out of her bedroom. When listening to her Music Box she falls under the effect of a spell that was cast over it.
The point of this game is understanding Waka's feelings and story. According to the creator's blog there are 3 endings so far, one of them is the "true end" and the other two are bad ends.
The game has no music as of ver.0.1, which is somewhat depressing and may make the experience of finding out what happened to Waka quite boring.