Tomokazu Mikuri is an ordinary sophomore in high school living with his older cousin, Nanase, who finds himself in the dream world on his 16th birthday. There he meets Mone, a mysterious young girl, battling a strange enemy called Faydoom. When he awakens from his dream, he finds Mone in his bed! After a crazy day of finding Mone in his room, to school, and then his birthday party, Tomokazu falls asleep and finds himself back in the dream world.