Yuuichi Nanase is currently living with his five beautiful little sisters: Hiharu, Zakuro, Hinata, Rika, and Sakura. One night, he dreams about his sisters standing naked in front of him. As he wakes up, he wonders about the significance of the strange yet delightful dream. Little does he know, this dream precedes a much more enjoyable experience! [Written by MAL Rewrite]