Was trying to perfect Mio’s Fudepen Ballpen, which is 2-star, but I found it too hard since it has a lot of continuity traps (it has a lot of instances where the last note is on the right edge, and the next wave’s note is on the left edge).
So I perfected a 3-star song instead, which is none other than Ritsu’s Sweet Bitter Beauty Song.
It took me two tries, and I unlocked Ritsu’s jersey costume and Sawako’s guitar item… O.o
I have never really found song’s star ratings to be accurate, also in Project Diva series. Maybe it’s up to the individuals…