Love in the Living Room: The tense daily sex life of secretly having an affair with one's sister-in-law while sitting next to one's brother. (Mukai Ran JUQ-552)

During summer vacation, I went to my brother's house. After my brother and Lan got married, Lan and I were childhood sweethearts. Moreover, Lan and I had dated before, so I was really looking forward to seeing her again. Lan was still beautiful and innocent, which made me unable to suppress my feelings. Lan, like me, stayed close to my brother. Whenever there was a moment of separation, we would secretly flirt with each other, making our relationship even more intense.