Good Friend

Ongoing Serial: a series of episodes, published over a span of weeks/months/years where the story plot is connected from chapter to chapter and must be read in chronological order for it to be understood properly.
Chapter Serial: a series of episodes, published over a span of weeks/months/years where the story plot is self-contained to a single chapter. There may be an overarching plot, but the stories can generally be read in any order and be understood
Book: an all-in-one self contained story published as a one-off.
Supplement: an an all-in-one self contained story published as a stand-alone supplement to a regular weekly/monthly periodical.
Short Story: an all-in-one, self contained story that was published in a regular weekly/monthly periodical
Anthology: a collection of all-in-one, self contained stories that were published in a regular weekly/monthly periodical but are generally grouped together.

Good Friend (aka Nakayoshi)

Also known as なかよし (Nakayoshi), it was been home to most of Tezuka's important shōjo manga series, such as The Twin Knights, Angel's Hill, and the remake version of Princess Knight.

Princess Knight [Nakayoshi] (Manga)

Although it is a remake of the original story, Princess Knight [Nakayoshi] (1963-64) is the more well-known of the two. This completely re-draw and re-written version of Princess Knight was serialized in Good Friend from January 1963 to October 1966 and was the main inspiration for the animated television show.

Twin Knights, The (Manga)

This sequel to the original Princess Knight [Shojo Club] (1953-56) was serialized in the magazine Good Friend from January 1958 to June 1959.