When I was a student, my brother brought Aika home to introduce her to the family. Ms. Ranran Fujii is an extremely cute and beautiful girl, especially her big breasts make me unable to take my eyes off her! I feel jealous of my brother for having such a good girlfriend. Hearing the sound of two people fucking each other in the next room made it difficult for me to control my excitement. Some time later, Ms. Ranran is now my sister-in-law, and I have also graduated and gone to work. This time on a business trip to Tokyo, my second brother invited me to stay at his house for a few days to avoid having to rent a hotel. So after many years, I met Ranran again. She's still as cute and beautiful as ever. But... she's not wearing a bra! I could see the two beans sticking out and the shape of her round breasts! Especially when I found out that my brother kept working overtime and not having sex with my sister, I couldn't stand it anymore! Can't let such an attractive body go to waste! At first she resisted, but after realizing the feelings and enjoying the pleasure that my cock brought, she began to actively join me. And so, during my stay here, I replaced my brother in "taking care" of my beautiful sister-in-law...