STARS-737 Summer comes to visit my cousin and the ending

This summer is hot... When I returned to my hometown for the first time in a long while, Saki-neechan, who lives next door, called me. It was a complete change from the way we used to play together as kids, and it exuded the sexual allure of adulthood. While I was playing a hand-played tune, feeling nostalgic about the past, I touched Saki-oneechan's body, and I couldn't take it anymore, so I unconsciously hugged her.