To prepare well for the upcoming exam, I was allowed by my parents to stay at my aunt's house in the city to get used to the environment here and have quiet time to focus on studying. However, when I came here, I became fixated on my aunt's wife, Tachibana. She is beautiful and has a pair of big breasts that captivated me, I always sneak glances at them. Obscene and dirty images always appear in my mind. I even imagined her sucking her own son's penis, and many times I secretly sniffed her panties and watched her bathe. Those actions seemed unsatisfactory, I couldn't bear it anymore, so one day I gathered all my courage to confess everything to her and expressed my desire to have sex with her just once. Her reaction was beyond my imagination, at first she showed sympathy and then happily agreed to have a relationship with me not just once but many times afterwards.