Question: I have had problems finding a last illustrated scene, since I was already able to finish the game through the two endings and the two secret endings (incredible work I must add), but when I chose the FJ option during the exploration only one appeared independently if the bar Whether it was complete or not, it was good or bad.... thanks in advance. Pd: please excuse the poor writing skill. 
Don't worry. ^^ Anyway, if you mean the black window with "Footjob (Goma)", then there is sadly no art for it yet. Actually, right now it is being worked on and my Subscribers can admire the sketches. But either way, plenty of art is still missing. Black images in the Gallery mean that the scene is not illustrated yet. ^^