My niece I met for the first time in a while has grown into a defenseless, busty girl, so I can do whatever I want every day.

"Huh? This girl... isn't she too gross? She doesn't resist even when she touches her... she does whatever she wants to do something lewd!" On a hot, humid summer day, my niece, Rina, came over to sleep in. In a few years, she has grown to be surprisingly cute and big breasts, but her insides remain the same as before! Even Mina-chan, who has been unresponsive to her days of having sex while taking a nap, doing naughty pranks, taking a bath together, and having creampie sex with her breasts all the time, gradually begins to feel it! Enjoy the big breasts of my niece, who is defenseless and unresistible!