Yusuke, an orphan, literally has Rouge, the amnesiac oldest daughter of the Underworld's deposed royal family, fall out of the sky into his lap. She is soon followed by her two younger sisters and also their family's enemies. Rouge must decide if she wants her memory to return, while Yusuke must deal with the upheavals in his life the Princesses have caused.

Princess Rangiku lost her entire family to Lord Karimata, who invaded her home seeking her father's life work, puppets with unique capabilities. As her duty, Rangiku sets out with three of her father's greatest puppet warriors to seek revenge. She can manipulate these to battle the strongest of warriors, however manipulating the puppets leaves her own self vulnerable to direct attacks, so she seeks a ninja warrior named Manajiri to aid and protect her in her quest.

Princess Minerva enters a tournament that offers the winner a fortune. But when her bodyguard gets kidnapped by an evil sorceress, things really start to heat up.

Yuuta was 12-year-old boy, who had lost his father in the traffic accident one year ago. In the summer vacation, he visited a deserted dam deep in the mountains, where he had a good time with his father before. Suddenly a thunder storm occurred and he slipped on the ground. He lost consciousness and woke up to find a girl and an unfamiliar village. He time-traveled 30 years and reached a village, which sank at the bottom of the dam. This is Yuuta's precious memory of "another" summer vacation.