While I couldn't find a direct example of this pose, my best guess to what this may be in order is actually [b]Sex Position #28[/b], otherwise known as "[b]Bow Harmony[/b]", with the main differences being the upright position of the giver as opposed to the sideways position here, and vice versa for the receiver. In this position, it is extremely important to "[u]cooperate, bodies need to move in unison and to complete harmonically each other, filling the bodies with the desired pleasure.[/u]" (https://xhamster.com/videos/the-11-most-crazy-sex-positions-part-2-xhPpVXI) My Second best guess would have to be kotatugakure, a pose to where the giver resides under the receiver, and pushes upwards for pleasure. This could possibly be the pose, if the giver and receivers were both sideways. Now, my first guess, the one I'm absolutely positive about, is the Kamasutra Sex Position 42: "[b]Head to Toe[/b]". (https://www.scribd.com/document/422240159/50-Kamasutra-Sex-Positions) The position is literally the pose presented within this picture (albeit the position had women in mind). Simply put: This is a gender adaption of this position.

What is this position called?