My Lovely Sister-in-law: Yurika Aoi

I was staying at my brother's house due to work. Our lifestyles were different, so we didn't see each other much, but my sister-in-law, Yurika, was very kind to me, and I was always happily excited. That was only natural—ever since my brother introduced me to Yurika, I had fantasized about having such a wonderful wife myself. One day, my work schedule changed and I came home early, only to find Yurika masturbating alone while watching porn. I tried to quietly leave, but she noticed me. I fled to my room, and Yurika followed. She asked if I had seen her, and I nodded. She said I must despise her, but I shook my head. Then, overwhelmed with nervousness, I blurted out that I liked her. She then asked if I would keep what I saw a secret. I nodded, and she said, 'Then, as a condition for keeping it secret,' and gently closed her eyes, bringing her lips close to mine...