U Don't Know Me summary:

Childhood friends Seyun and Yoojin struggle to maintain their friendship as their lives take them down different paths. But when old feelings start resurfacing, a bitter tug-of-war starts, with hearts in the balance, secrets in the closet, and twists that nobody sees coming! note: "U Don't Know Me" was originally published as donginji (doujinshi) in Korea. Chapter 1-6 collects the three donginji books published.