Himitsu no Akko-chan: Umi da! Obake da!! Natsu Matsuri
Japanese title: ひみつのアッコちゃん 海だ! おばけだ!! 夏祭り
Type: Movie
Source: Unknown
Episodes: 1
Status: Finished Airing
Aired: Jul 15, 1989
Duration: 24 min
Rating: G - All Ages
Studios: Toei Animation
Demographics: Shoujo

Everybody goes to the ocean for a summer festival and the guys sneak off to a cursed island.