Aidoru Senshi Mirakuru Chunzu! (2017)

It is the 2nd instalment to the Girls x Heroine series. They both start with 3 members but later end up with 5 as the series goes on, each character has magic powers and can transform. There are mascots who help support the girls as well as a mentor-like figure. Both series have an idol group that provide the opening and ending themes.