During the summer vacation, I went back to my hometown. The person who greeted me was my sister-in-law Kana...I was glued to her mature smile and the clearly visible panty line from her maxi dress. That night, when I looked through the sliding door of Kana and her friends' bedroom, I saw Kana, her face flushed, fixing her disheveled clothes. I was captivated by her lewd appearance, and the next day I witnessed Kana comforting her body. My crotch swelled at the sight, and I drove my dick into Kana from behind...