Wakakusa no Charlotte is a vintage shōjo anime series produced by Nippon Animation Co. Ltd. It was first aired in Japan between October 29, 1977 and May 27, 1978, and is based on an original story by screenwriter Shun'ichi Yukimuro.
Interesting anime - harmless title (and misleading if it makes you expect some kind of romance series) and starts with an extremely standard&lightweight mood&setting but it progressively becomes quite the opposite (especially its 3rd quarter). I personally think that it's generally underappreciated, but it probably depends a lot on the individual taste.
I liked it and I still watch it from time to time.
Animation & sound are good/ok (nothing mind-blowing).