[JUR-522] "If it's just masturbation, it's not cheating..." On a business trip without my brother, my sister-in-law is 'addicted to masturbation' and I am 'Kana-san's exclusive' okazu Kana Kusakabe

After graduating from university, I couldn't find a job, so I was allowed to stay at my brother's wife's house to get my qualifications while working part-time in Tokyo. My brother, who has always been strict and serious, works for a first-class general contractor in Tokyo and seems to be busy every day. Supporting such a busy brother is his wife, Kana. Unlike his older brother, he is a little calmer, but he is very kind and seems to get along well with the couple. One day, after almost a week of such a stay, I was away from home for 2~3 months due to a sudden business trip.