Since my school days, I've lived with an inferiority complex, never able to match my older brother in anything. What hurt the most was secretly listening to him and Mayuki having sex in the next room while masturbating, feeling envious and frustrated. Mayuki was his girlfriend, and I was just harboring a one-sided crush. Later, I thought they married and lived happily, but when I visited Tokyo for work and stayed with them, something felt off. Mayuki looked downcast, their marital relationship had become stale, and my brother dumped me on her to go drinking. 'Hey, you've always looked at us with envy, right? Then just hold me,' Mayuki's temptation made my heart race uncontrollably. I hesitated about embracing my longed-for sister-in-law but gave in to the lure. Her real breasts and moans unleashed my pent-up emotions. I felt that the only way I could surpass my brother was through my love for Mayuki, and we embraced repeatedly. The next morning, my brother returned home to a tense atmosphere and pushed me off with, 'Why not go sightseeing in Tokyo with Mayuki before leaving?' We ended up at a love hotel, where I responded to Mayuki's strong sexual desires and affirmed our love. Watching this work, I was drawn into the human drama of conflicting emotions and found myself completely engrossed.