people have recommended tgswiiwagaa so! i'm recommending "managing a wild idol" and "my new friend wasn't what i expected", both by kai bashira

mawi is currently still ongoing and is about an idol whose personality is very different when not performing, and her manager

mnfwwie is short and completed and is about a high school girl who became friends with the girl sitting next to her in class and getting to know more about her friend outside of school. kind of similar to tgswiiwagaa in the way that one girl is like aya and the other is like mitsuki, except they bond over fashion instead of music