Which would you choose: "a flat-chested girlfriend who is strong against thrusting" or "her big-breasted sister who is weak to thrusting"? I started thinking that around the time I started dating her. She's my pride and joy, but she's very guarded when it comes to sex (crying). On the other hand, her sister gives off a quiet and timid impression, and I, who was at my limit of horniness, ended up touching my sister-in-law's big breasts... Eh! She doesn't resist strongly (laughs). From there, I decided to secretly have sex with Nanami-chan, my super-sensitive sister-in-law!
S1 NO.1 STYLE
