Project Arms Vol. 2: Nice New Rattle (DVD, 2002)

Ryo Takatsuki lived the life of a regular high schooler until he woke up one morning to discover that his right arm had been mysteriously replaced with a powerful nano-machine driven weapon called "ARMS". Suddenly thrust into the middle of a secret world full of nano-machines, cybernetic assassins, Ryo is the run from a shadowy collective determined to steal his powers by any means necessary. In these episodes, Ryo and his friends find that the Egrigori have redoubled their efforts to capture the ARMS, resulting in the kidnapping of Takeshi's sister. Now, Ryo, Hayato, and Takeshi must rescue her from the clutches of two deadly androids known as the Chapel Twins who have taken over their high school.