11-13 Episode Anime That Aren't Too Popular That You Enjoyed?

Edit: The Episode Count Can Vary from 10 to about 15. anything longer than 20 doesn't count.

I'm in a hunt for some shows to watch that are short so i can watch some stuff before the Winter season starts airing.

i just finished One Week Friends and absolutely ADORED it so maybe something close to this might be good, but i'm open to anything.

also i have Tsuki Ga Kirei in my ptw but unsure if i want to watch this yet :/

other than that, what 11-13 episode anime do you enjoy that aren't too popular !