Ero manga series originally published in Comic Megastore (now released as a tankoubon) by Fukudahda.
Characters
Eleanor Mercer, or Erina to her friends. Due to growing up in Japan, she has Japanese tastes in food and can't speak English - in fact, she's failing her English class.
Yumioka Masaki, her childhood friend and sex buddy.
Yoshimi Tetsu, Erina and Masaki's male classmate. He and Shinobu are secretly carrying on a relationship.
Karen Mercer, Erina's mother. British. Close friends with Masaki's parents.
Summary
Since Erina's mother Karen works for an airline company and travels constantly, she left Erina in the care of Masaki's parents when the two were very young. She and Masaki have been together ever since. The manga is a short chronicle of their life and relationship (mostly sexual) during an eventful part of their time in high school.
The hook? Apparently, Erina inherited several physical quirks from her mother: Blonde hair, blue eyes, large breasts, an almost nymphomaniac sex drive, and a unique hormone condition that has caused her breasts to lactate since she started puberty.
