Yuuki Wakasa is a typical 5th-grade schoolgirl who dutifully helps her mother around the house by taking care of her three younger brothers (a.k.a. the "monkeys"). She's often found escaping to her room at any given chance to read manga, which her mother thinks she does too much of! However, when Yuuki finds a red magic stone she also discovers she's the 'chosen one' who must enter the world of dreams in order to save the Sun God from destruction.
