From Storm in Heaven:

The orphan girl Angelique lives in Hidamari Villa with four other comrades who make up the Orb Hunters. They aid her in purifying otherworldly creatures known as Thanatoi who attack the populace, draining them of their life energy. Two large organizations also oppose this threat, while its members try to discover more about the Orb Hunters and a possible connection with the legend of the Queen.

From Paperdolls Project:

Hotaru Kunoichi of the Iga Village has accepted a request to infiltrate Oda Nobunaga’s castle, Aduchi Castle. Under the guise that she is the younger sister of Mitsuhide, Nobunaga's confidante, she investigates the Oda army for dissenters. Hotaru deepens her relations with great military commanders, from Nobunaga to Hashiba Hideyoshi and Tokugawa Ieyasu. However, it will all be over if they find out who she truly is . . .