Pon no Michi: Ryuukyoku Shanyuu-hen

The original Pon no Michi is a TV anime depicting the sparkling daily lives of high school girls living in Onomichi City. This "Pon no Michi" is a "what-if" story that depicts the lives of these high school girls 10 years later…!

Yes, they will look different!
So please forgive us for what we're about to do!
An unofficial spin-off about their adult circumstances is about to begin.

(Source: Yanmaga, translated)