Also known as Hello Kitty no Minna no Tanoshii Natsuyasumi or ハローキティのみんなの楽しい夏休み
Plot[]
Kitty and Mimmy, also joined by their friends Pokopon Nikki and Tuxedo Sam with Chip go to the Southern Islands where Gator Gags resides for summer vacation. There they meet an old man that seems familiar and while scurrying off, he leaves behind an intriguing notebook which sets Kitty and friends off on an adventure to return it. Will the old man's secret be found out?
Source[]
Hello Kitty's Everyone's Fun Summer (English Subtitles)