Deja vu
A young boy decides to join a secret paramilitary organization, Spirits, in order to avoid school and follow some cute recruiter chick. His adopted sister gets mad and joins Spirits out of pure spite and jealousy.
Aired 25/11/2000EP 1 - Deja vu

2000
De:vadasy
For young men like Kei, life is still plagued by nothing but homework and girl trouble. When an unknown force besieges Earth with robotic war machines, however, it is Kei who is chosen to defend the human race.