The Bakumatsu period, a gap between the past splendour of the Shogunate era and the modern glamor of the Meiji period, is one of the most violent and intriguing places to start a romance. Yukimura has set off for Kyoto to find her missing father, but accidentally gets herself wrapped up in the intrigues of the Shinsengumi.

As she fell deeper and deeper into the darkness, she could hear the sound of rainfall. When she woke up, the young girl found herself in a Western-style mansion. An unknown, terrible monster rushes to attack the confused girl. As the young girl ran away from the monster, she thought: "Where is this place?" and "who am I, anyway?"

Dreaming of performing shinobi duties, Ueno Enju, daughter of the Kouga forces' leader, Ueno Kandou, had been training everyday. After finally being selected to go on her first mission, a major incident occurs. It not only derails Enju's fate, but the fate of the village as well...

Searching for clues about your missing brother, you and your childhood friend Hiroya begin playing an online RPG called Arcadia. You're suddenly enveloped in a flash of light, and awaken to find yourself in a mysterious fantasy world. You discover you've been sent inside of the game, and learn that the only way out is to complete it.