Chiisana Koi no Monogatari: Chichi to Sally Hatsukoi no Shiki
Genres: Romance, Slice of Life
Type: Special, Episodes: 1
Aired: Mar 20, 1984
Source: Manga
Rating: G - All Ages
Synopsis:
Tiny schoolgirl Chiiko develops a crush on older boy Sally and believes herself to be his girlfriend, although Sally is already involved in a love triangle with a girl called Tonko.

(Source: The Anime Encyclopedia)