Null Peta: Doki♥ Nurunuru Petapeta! Mizugi-darake no Oneechan Taikai!
Japanese title: ぬるぺた ドキッ♥ ぬるぬるぺたぺた! 水着だらけのお姉ちゃん大会!
Type: Special
Episodes: 1
Source: Original
Genres: Comedy, Sci-Fi
Studios: Shin-Ei Animation
Duration: 5 min
Rating: PG-13 - Teens 13 or older

Extra episode included in the Blu-ray/DVD release.