If you're looking for anime similar to Yuru Yuri Nachu Yachumi!, you might like these titles.
All Kobeni wanted for her sixteenth birthday was to enjoy a cake with her family, but her mother surprised her with a piece of unwelcome news instead! The teen’s late grandfather arranged a marriage for the girl, and her 'fiancé' Hakuya, along with his mature-for-her-years little sister, are moving into the house today! Now, Kobeni and her pervy older sister Benio must adjust to their new extended family life, from figuring out what foods the newcomers dislike, to explaining to their friends who these new relatives are!
There is a female interaction side of the show in Mikakunin de Shinkoukei which is strongly reminiscent of Yuru Yuri. Likewise, if you liked the female relations in Yuru Yuri with its slight supernatural edge, you will like Mikakunin de Shinkoukei.
The main difference in both shows is that Yuru Yuri consists of an all-female cast and does not involve romance of a serious kind. Mikakunin de Shinkoukei does have a romance plotline running through it, but it is very mild and while it might appear so by the description to be the main plot of the show, it feels like the role of the romance is placed more on the sidelines.
Mayu learned everything she knows about manners from her mother, such as letting others finish their sentences before responding and to clearly articulate your thoughts. Unfortunately for Mayu, this advice is difficult to follow when your friends are a bunch of talkative high school girls, and has left everyone thinking she's overly quiet and shy instead! With good friends such as chatty Miki and shy Hana beside her, Mayu will silently navigate her high school life and have plenty of fun in the process!
An all-female (main character) moeblob in both cases without much of a plot but definite shoujo-ai implications.
The main difference in both shows is the somewhat more timid nature of the comedy in Morita-san wa Mukuchi whereas Yuru Yuri is more extroverted and in your face.
The series follows two high school girls; Yachiyo Inugami, a dog-like girl who loves cats, and Suzu Nekoyama, a cat-like girl who loves dogs, and the strange relationship their respective habits form.
Both are moe-blob shows concerning an all female cast while additionally containing strong shoujo-ai elements. Yuru Yuri has some more going for it in terms of number of characters and their developments, but there are paralels to be found with most of the casts of both shows.
Furthermore, the artstyle (especially for many of the gags) is extremely similar and ventures outside the norm of the shows by overemphasizing or somewhat parodying more established shoujo-ai shows.
Main difference is that Inugami-san to Nekoyama-san is almost exclusively shoujo-ai comedic gags, Yuru Yuri is covering more ground and focusing more explicitly on school related scenarios.
Kanaka, Saki and Ayuko are three girls who, as fate would have it, meet each other just before starting high school. Kanaka accidentally bumps into Ayuko, ruining the girl's ice cream cone, and their friendship soon follows! Together, the trio navigates high school life, whether giving each other nicknames, racing each other to class, or just having fun.
The main similarity between these two series is the cast of characters. The number of characters which have paralells in this series is massive and the interactions are of the similar type of school life short gag type. All main and most supporting characters are female and there are some very slight shoujo-ai influences in both series.
Main difference is that the pacing in Yuru Yuri is somehow slightly higher than Aiura despite the difference in episode length (you'd expect Aiura to be high octane due to the episode lenght, but it's slower).
This comedy follows fourth grader Tomoo Kinoshita, who's always getting into misadventures with his classmates, and the other residents in his apartment complex.
There are many untold stories in the lives of Run and the others, such as the day Tooru received her high school uniform and why she always wears that purple sweater. With the gang witnessing Yuuko's extreme coping mechanisms when they drag her to a horror movie, Satou-sensei's bizarre forehead fetish and Tooru suffering the lingering effects of a nightmare, the girls never run out of things to do or stories to tell.
More fun is in store for Yuuko, Tooru and the rest of the gang! First, Kitou-sensei manages to hurt her hand while teaching math class, and Tooru attempts to smuggle her cat into the school to meet her friends. And after heading to breakfast to eat a mountain of pancakes, the girls must help out Yuuko, who gets a nasty fever!