Bokurano--Kitoh's own "emotionally unstable teenagers piloting giant mechs" manga. 15 kids wander into a cave and meet a strange man who invites them to play a game where they defend Earth from evil aliens using a giant robot. The catch is
Narutaru-- On the surface, it looks like another one of those Poké/Digi/Chinpokomon-type shows that were everywhere in the early 2000s. That's exactly what the author wants you to think. It's actually one of the most graphic, disturbing, and violent manga imaginable.
On the plus side, Kitoh has a love of aviation to rival Miyazaki, and his artwork is downright excellent. Have any of you read his works? If so, what did you think of them?