After her husband's mother passed away, Miyu moved in with her father-in-law Masahiro. Masahiro's lust for the beautiful Miyu was always growing. Miyu was living happily, unaware of this, until one day she reunited with Oshima, a man she had been dating before her marriage. Oshima still made advances on the beautiful Miyu, and Miyu accepted. However, the reunion was all orchestrated by her father-in-law, who used Miyu's infidelity as a weakness and played with her body as he pleased with his desires...