I was kept cuckolded in my futon... A 2-night, 3-day graduation trip where I was immoral by the close-up sex of a giant senior riding me right next to my boyfriend

The fair-skinned, delicate Kano Yura's slender body is once again cumming with the press of a giant horse! (Synopsis) I can't cross the line with Yura, the first girlfriend I've ever had. When I consulted with my senior, he told me I would follow you, so I decided to go on a graduation trip to a hot spring. I had so much fun that I ended up drinking too much and going out of control, but finally I had the chance to have sex... when my yukata was undressed, I realized something...