MUGON-007 My older sister, who is conscious of being a woman, quietly entered my room in the middle of the night

A younger brother who is overly conscious of his older sister as a woman. Every day my heart throbs at the appearance of my sister who is not cautious and rough. One day in the middle of the night, my sister quietly enters my brother's room. When I pretended to sleep on the spot, my sister slowly rolled up the futon...