Yume Oukoku to Nemureru 100 Nin no Ouji-sama

is a Japanese otome puzzle RPG freeware published by GCREST. An anime adaptation - is receiving 2 anime adaptations in the not too distant future: a short form anime in 2017, and a TV series in 2018.

Plot
Our heroine is a normal girl who somehow becomes the princess of the "Dream World", where people use dreams as life energy. But the dream world is being threatened by monsters called "Dream Eaters", putting those deprived of their dreams into a deep sleep, mostly the princes. The heroine must awaken the sleeping princes to save the dream world from destruction.