MOND-097 The younger sister-in-law Mariru Morinoshi, who was completely smitten by her brother-in-law

I am called Morinari Mariru. After getting married, my brother-in-law came to visit for the first time. He was dressed so tacky that it immediately irritated me, and because he was there, I couldn't have sex with my husband, which was annoying. Until I saw him in his underwear. A large bulge different from my husband's was sitting in his crotch. What? How would this look when erect? Confused, I couldn't take my eyes off my brother-in-law's bulge and found myself wanting to experience it at least once.