cinnamonZephyr is the developer of the Yume Nikki fangame deja vu.
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About the development of deja vu:
"This game was originally created as a ordinary fan game, but then creating and thinking through the plot made it ynfg look a tribute and love for the original game.
once the project is no longer open and I fell into despair. in order not to lose my skills I started to create another fan game - spinOFF (OFF fg) with the same characters that were supposed to be in the first game. but the problem was solved and the spinOFF stopped at the beginning of development."[1]