I have a girlfriend who is not beautiful, but she has a very good personality, and we have considered getting married. Today we went on a hot spring trip with her best friend. Jun is my girlfriend's best friend, and I was attracted to her from the first time we met. However, Jun already has a boyfriend and they are engaged. When I found out about this, I suddenly felt an indescribable jealousy. When Jun's boyfriend and my girlfriend passed out from drinking, I secretly followed Jun to the hot spring bath. As I looked inside, I was captivated by her beautiful body. As if possessed, I moved closer to take advantage of her body. Despite her continuous attempts to avoid me, I could feel Jun's body trembling with pleasure with each of my thrusts, especially her wet and narrow pussy. Unable to control myself, I repeatedly ejaculated into Jun's pussy, and she slowly began to synchronize with me, no longer resisting. Throughout our time there, we sought each other out whenever we had the chance. Some time later, my girlfriend said Jun was pregnant. Upon hearing this, I felt very happy because I knew for sure that the baby in Jun's womb is mine...