Chiisana Koi no Monogatari: Chichi to Sally Hatsukoi no Shiki
Japanese title: 小さな恋のものがたり チッチとサリー初恋の四季
Type: TV Special
Episodes: 1
Source: Manga
Genres: Romance
Studios: Eiken
Producers: TBS
Duration: 1 hr 10 min
Rating: G - All Ages

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)