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100 Sleeping Princes & the Kingdom of Dreams: The Animation
Yume Ōkoku to Nemureru 100-Nin no Ōji-sama - Japanese
夢王国と眠れる100人の王子様 - Japanese
Imagine you are living your normal life then one day you wake up in a strange land where everyone believes you are a long lost princess and that you must save the kingdom from the "yumekui" or dream eaters. To help the princess save the kingdom she must wake up the princes, as the princes are unable to wake up due to having their dreams stolen.