After I became a working adult, I was sent to Tokyo for training. Thanks to the kindness of my uncle, I was taken care of during my business trip. When I met my cousin U-chan again after a long time, she had become erotic and cute. Her underwear was visible even when she was eating and cleaning... She even showed me her sex with her boyfriend. Is she defenseless? Is she trying to seduce me? There was no time for training, and our dream life together began.