It's one thing to wake up from a dream and be a little confused, but on his 16th birthday Tomokazu Mikuri wakes up WITH a dream, right next to the strange girl that he'd just been dreaming of! Weirder yet, his hot older cousin, Nanase, takes the new addition to the household perfectly in stride and enrolls her in Tomokazu's high school, despite the fact that the girl can only say one word: "Mone." But things get totally out of control when Tomokazu discovers that he can take others back and forth to Mone's dream world, where his new found abilities may be the key to stopping a nightmarish invasion! Faster than you can say "Harem Anime," Tomokazu's two worlds collide as girls from his "real" world join with those from the dream world to take on the evil forces of the Feydooms! But can a 16-year-old nobody really lead a super hero team, stop the bad guys, save the world(s,) and/or get the girl(s) in the end? It's the kind of thing that only happens in dreams, but when the whole world's a dream world, anything might be possible in YUMERIA!