Dibetagurashi: Ahiru no Seikatsu - Ahiru no Sumu Shima
Japanese title: ぢべたぐらし あひるの生活 あひるのすむ島
Type: ONA
Source: Web manga
Episodes: 1
Status: Finished Airing
Aired: Apr 25, 2014
Duration: 3 min
Rating: G - All Ages
Genres: Comedy, Slice of Life

The 40th and final episode of Dibetagurashi: Ahiru no Seikatsu. It was never aired on TV and was only available to view digitally on official Japanese streaming services when one purchased the 36-40 episode package.