(from ebookjapan):
Kokuriko, the proprietress of a small restaurant called "Ichibanboshi," lives alone with her son, Mokudoki. Today, men with ulterior motives gather at her restaurant. She suffers from a strange disease called "congenital hyperhormonal hyperchromatism," a condition that causes abnormal sexual development. She has a big chest and wears tight clothing, so her breasts are always popping!