KSBJ-053 Big brother's wife Miyajima Yuu

I'm a freelancer and currently living with my brother and his wife. My brother works as a salesman at a trading company, always chasing quotas, leaving early in the morning and coming home late. There are days when he doesn't come back because of overtime work. So I often end up alone with my sister-in-law, Yu-san. Yu-san is beautiful and kind, treating me like a friend. However, since seeing her in that state, my days have been awkward…