My girlfriend is completely naked in the 'naked group' house. Haruka, her younger sister, will be staying for two weeks at a cram school summer course. Haruka-chan, who is completely naked in greeting, is impatient! Even if you say, "It's natural because it's a family," the gaze is on the breasts and crotch of the G cup. "Huh? You've got an erection! Sneak out and pull it out!" Haruka-chan is fearless when she's in the bath or next to her sleeping...and I get an erection.