Proposed by Mawoin on 12 Feb. 2023 at 08:23 AM
This proposal will make the following change(s):
Update the episodes duration of the anime Ningyohime Marina no Bouken
Change the episodes duration from Unknown to 20min.
Based on the following reason: Missing
With the source: https://anilist.co/anime/3194/Ningyo-Hime-Marina-no-Bouken/
