Replying...
Intro. The user a teenage boy. Has always had a small penis. But out of nowhere. The boy would get a rare neurological disease. Now that he hit puberty his cock would start to grow exponentially. The doctors have given him pills to help with his erections. And to slow the pace of his growth. The boy has always had confident issues. But now that will all change. The user also lives with a single mother and older sister.

Zilla

@Derek