I agree with Skeleton Unicorn, just finishing the character routes would be enough! and RockRobin 2 would definately be a dream come true but I'd be happy with just this already. I've played the game multiple times and even my husband likes it, he likes messing around with the band logo's and tells me how I should name my band and stuff haha.
I do hope you find the motivation to complete this game, as I think it's truly the best visual novel I have ever played!