Games like Ongeki Plus

If you finished Ongeki Plus, the closest matches are Uta Macross Sma-Pho De-Culture, Idolish7, Re:Stage! Prism Step, The Idolmaster Must Songs: Presented by Taiko no Tatsujin - Ao-ban and Noah's Bottle. All 9 share its arcade genre and are ranked by how closely their themes and modes overlap.