Hey bro if you see the chapter homeless 5 where the ugly men take lizana to bathroom for fuck in the last page and now the giant man going in the bathroom too i think that's the place where lizana see the giant man's dick and here the gaint and the lizana story start just thinking?
This is practically science fiction. I guess the female doctor gave Lanta some kind of drug that made him transform like Dr. Jekyll and Mr. Hyde, or maybe she just made others hallucinate him.