I Think It Makes Sense for Primitive People to Use Mechas.

Living in a cave, surrounded by animal skins, holding a somewhat familiar wooden stick, living in a cave, surrounded by animal skins, holding a somewhat familiar wooden stick, living in a cave, surrounded by animal skins, holding a somewhat familiar wooden stick, living in a cave, surrounded by animal skins, holding a somewhat familiar wooden stick, This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.