One rainy night in the Edo period, Kotono (a geisha) confronts samurais who killed her father. The samurais attack her one after another, but she fights hard against samurais with her sword. Kotono tries to chase the samurais who scramble to escape. Yet now three ninjas stand up against her. Kotono drops her sword by their wave of assa...

Ryo Hanaki was raised to be a professional assassin. One day he was defeated by some accident in the mission. Here he meets Rio, an attractive high school girl. He spent days as a heartless assassin, but his life starting changes after he helps Rio. By a twist of fate, Rio who was a complete unknown became an assassin target overnight....