Hello!! Kiniro Mosaic

Both series are sequels to their first seasons. They both continue on from the first season, where the protagonists from both series create more memories that are laughable, cute, etc. Both series take on the slice of life, comedy genre. The protagonists in both series are also quite cute and lovable. 

Both series are made by the same studio, they both have a similar basis, and the protagonists are super cute and lovable, not to mention lolis as well. Both series share the comedy, school, and slice of life genre. I'm sure that if you loved Kiniro Mosaic, you'll definitely love A-Channel. 

Both are second season of slice-of-lifes with the same warm vibes. Simple, sweet, and humorous. 

Second seasons of popular "cute girls doing cute things" slice of life anime that are very lighthearted and funny, not to mention the moe atmosphere. Both are based on Manga Time Kirara manga Both Ayaya and Rize share the same seiyuu, and so does Karasuma-sensei and Chiya.