This image is absolutely perfection in terms of composition. It follows a parallel pattern which makes your gaze go up and down. Starting with the their feet and follow their legs, which you notice their knees touch, and then you a get a pretty nice view of those juicy cocks and plump balls in full exhibition, erect in each other's grip. The sunshine plays a key factor here, as the contracts between light and shadow enhances the beauty of the kappas' cocks. Our gaze is capture right there before going up and notice their slender bodies and facial expressions. It is really remarkable how much this image tells you without any text or anything leading up to this scenario. The fact that their garments are mostly in place tells us Nitori and Takane couldnt resist the tension building up between them, thus leading to jerking each other off and reach some sort of relief. But also, giving their position and sweat on their faces, we can infer this is a clandestine activity taking place in the middle of the noon, and thus they barely took their clothes off just in case they need to dress up quickly and play dumb. Despite of this, you can see the arousal on their faces, specially the smugness of Takane as she has the slightly bigger cock here, thus leaving Nitori with an expression of slight determination, as if she is planning to outdo Takane in a different aspect.
I really like this picture for all of these factors combined. The only thing Im not too pleased with is that I cant be there to blow those cock and be double teamed by Nitori and Takane