... How about the taste of Ji ○ Chin milk?" "Hmm, I don't really understand ♪" While her sister-in-law is away, "I" = Rumi-chan, a niece who was taken care of by her uncle. For some reason, she was trying to play with her as usual. The body of a cute niece has grown! Rumi-chan, whose heart has remained innocent, but her body has become an adult. Her uncle's desire is also full throttle to the change of her niece who is too irresistible for a man !! "... Then Rumi-chan, let's play an adult different from usual today ...?" Sucking on your boobs and messing around with your puffy boobs ... Of course, "play" can't end there ...? survive The most "Ah ... I'll tell you what happened right now!" Story in the history of motion comics! But it's not good! Enjoy a dream-like moment with your big niece with all your might!