My sister took me to a hot spring to celebrate my passing the university entrance exam, and we went on a short trip together! As soon as we arrived at the inn, my big-breasted, beautiful sister started sucking my erect dick, and then we had creampie sex in a private open-air bath, and when I was asleep, she had sex with me at night, and she started to crave my dick! A completely subjective view of a lovey-dovey baby-making trip with my naughty sister.