If you liked the K-On!! anime, the Anime-Planet community thinks you'd like:
Incensed at the damage done to the sea and its wildlife at the the hands of humanity, Squid Girl rises from the depths of the ocean to enslave humanity! Her mission proves more difficult than it first seems, however, when she gets dragooned into working at the Aizawa beach restaurant. Will the easily distracted, blissfully ignorant, and slightly thick Ika-Musume convert her managers' humble house into her base? Will she use the power of her mighty tentacles to bring all of humanity to heel? Or will she at least learn how to properly wait tables?
Super Sonico is an 18-year old college student who plays guitar for the three-girl band Fastest Speed in Space and models for pin-ups. In spite of her busy schedule, she still finds time to help her grandmother at her restaurant. One night, her band members Suzu and Fuuri, are late to a concert, forcing her to play alone. The result of that show will have far-reaching consequences for Sonico.
Both anime feature a lot of young women playing instruments and a whole lot of focus on slice of life stuff (keep in mind that SoniAni is far more vapid than K-On! ever manages to be). SoniAni is very much ecchi, while K-On! usually manages to not sink to such low tactics. The cast in K-On! is much more varied and features several mains, while SoniAni is basically just about Sonico. Still, if you saw one and want more female characters playing instruments now and then, do check the other one out.
Ahh, the life of an elementary school student. Though Chika, Matsuri, Miu and Ana should focus on schoolwork, they’d much rather have fun instead. Whether it’s outings with 20-year-old-chain-smoker Noboe, holding each other hostage or learning to speak English with Ana’s foreign-born skills, there’s never a dull moment in the life of the girls. Join this cute quartet as they do cute (and often devious) things in cute and quirky ways!