I finished the route with Chester (pretty sure it was a good ending) and then afterwards did Dozers, unfortunately it did not work. If possible, I wouldn't mind a picture of the shower scene of them was dropped here for uh... research purposes > : 3
Actually, you just need to finish Chester's route as best as you can. I also had the same issue, but after some experimenting with choices I've managed to unlock it. But there is more than just that scene ;)