Chiisana Koi no Monogatari: Chichi to Sally Hatsukoi no Shiki

小さなちーさな恋こいのものがたり チッチとサリー初恋はつこいの四季しき

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.