Paca Paca Passion by PRODUCE!, as well as its two sequels, are pretty fun. It's basically like DanceDanceRevolution, but you have to dance against CP-controlled dancers ala Bust A Groove, and failing/losing will give you a chance to continue. Just like in DJMAX TECHNIKA, a progress bar travels across the screen, making notes not move. You are forced to stop playing if the countdown in the danger zone reaches zero.
Unlike DanceDanceRevolution, a character has different charts, mainly corresponding to the instrument of the tracks. The four main characters are Coke: the blue-haired boy with the headphones, Miruka: The brunette girl with the sunglasses, Purika: The lady with the rabbit ear hairband, and Geroppa: A man-like robot with an afro. Geroppa has the hardest stepcharts ever made for the Paca Paca Passion series to date, and is usually the character for each of the tracks' hardest charts.