The incestuous love story of sisters is truly tragic. Miyu Kanade is a beautiful and proper older sister who always loves her younger brother. Because her disobedient younger brother always gambled and owed a lot of money, the older sister was very upset, and one day gangsters came to the house to collect the younger brother's debt. Because she had no money for her younger brother to repay the debt, these guys forced her to have sex with all of them and her younger brother to be released. And then she agreed after that…