MXGS-267 Hikaru, my younger sister. Shiina Hikaru

My sister is 18 years old. Sometimes he says impertinent things, but basically he takes good care of me and is a great wife. Recently, it has become strangely sexy, and I am confused about where to focus my eyes. Every time someone calls me “onii-chan” or “onii-chan”, something in the depths of my heart crumbles.