Null Peta: Doki♥ Nurunuru Petapeta! Mizugi-darake no Oneechan Taikai!
Genres: Comedy, Sci-Fi
Type: Special, Episodes: 1
Aired: Jan 31, 2020
Studio: Shin-Ei Animation
Source: Original
Rating: PG-13 - Teens 13 or older
Synopsis:
Extra episode included in the Blu-ray/DVD release.