Tenchi Universe "no need for discussion"

Tenchi Masaki was just a normal teenager leading a normal, quiet life, until his entire existence was turned upside down by the arrival of Ryoko, a girl from outer space. After claiming to be on the run from a vicious space pirate, Ryoko asks Tenchi for help, and pretty soon he is caught up in the middle of a battle that may turn out to be only the beginning of his adventures