Tokimecha summary:

Released in 1997 in three parts in issues 3-4, 5-6 and 7 of Weekly Shonen Jump. Tokimecha was one of Akira Toriyama's post-DB work. The story follows a young girl by the name of Tai who manages to create a "Tokimecha", a machine that allows her to travel back in time where she meets a young caveboy by the name of Muu. Wacky hijinx quickly ensues when this girl of the modern age learns that life in the stone age can be savage and terrifying.