Idolls!

It's a similar story about people becoming idols from the ground up. However, I like Idolls because it gives a more in-depth perspective on how being an idol works. 

Idolls and Holo no Graffiti have the same type of animation somehow, full 3D animation, which I must say it's very fluid. Both are also short on their own way, Idolls having episodes of 8 minutes and HnG having episodes ranging 1 to 2 minutes. While Idolls have the slice of life type of comedy, with a history and such, Holo no Graffiti presents a history per episode, with complety full usage of random surrelistic comedy. Both worth a watch