PARATHD-3564 My friend's little sister is incredibly cute and way too naive, so she seems easy to hit on (3)

★My friend's little sister is super cute and friendly, and she's defenseless showing me her panties and nipples! ? Are you invited? ! When I went up to my friend's house who always hangs out, my sister is alone today. At first, I was hesitant to talk to my friends because the relationship was going to be awkward, but I can't stand it anymore! Even if I didn't confess, I decided to invite my little sister, and it gradually turned into a naughty atmosphere. It was ecchi after all.