Romance, School Life, Shoujo, Adult, Smut

After my Mom got married to her second husband, it made Chinatsu my younger brother. At first, I thought he was surely a perfect brother after seeing his angel-like smile, however, the truth is that he is really a pervert and very ill tempered! I was surprise when I found out my angel-like younger brother is really a little devil?! Will I just allow him to abuse me?!