Widow gang-raped by all her relatives

The four Shiraki brothers live in a mansion. The eldest son ran away from home when he was young, the second son took over his father-in-law's hospital, and the fourth son moved into a university dormitory. Yuko married her third son, Kenzo, and lived happily with her mother-in-law. However, her husband suddenly dies in an accident... and before the first anniversary, she also loses her mother-in-law. ``When I die, I will give this house to you.'' Amid sadness, she tries to protect this house full of memories with her mother-in-law's words in her heart, but one after another, her husband's brothers move in, aiming for the mansion and the widow's body...