Her sister came to Tokyo and stayed at the house we live in together for a while. Since she had gone to work, I showed her sister around the room, only to discover that her sister's nipples were visible through her shirt after taking off her jacket! It turns out her sister wasn't wearing a bra! What? Do people in the countryside all go braless…?! Unable to hold back, I started kneading her bra-less breasts and ended up having sex with her. It seems like I ignited her desires because starting from the next day, she was the one seducing me, so I ended up ejaculating inside her multiple times…
