Meka Senshi メカ戦士 (Mech warrior)

Story A long time ago... uh, actually nope. In the future, have a guy who doesn't like to study. However, he get a job that standing on top of the world, we usually call them 'Window cleaner'... One day, a colleague wanted to kill him hm... because the window cleaner had a higher salary than his colleague. When the time he fainted, he also wanted to be a ninja when he was a child. So he becomes a…