Bokonyan (凹にゃん) is the developer of the Yume Nikki fangame Ex.Emi. They often uploads playthrough video of other Yume Nikki fangames on Niconico douga.
Links (NSFW)
Trivia
At the Bokonyan's request, their personal data (such as their birthday) are prohibited to submit on this wiki, except their Yume Nikki related activities.