Shinsei came to the Sagawa family as her mother's stepchild after her remarriage. However, that mother leaves immediately. The stepfather and son sexually abuse Shinsei out of spite for their mother who left. Slaps without holding back, intense irrumatio. Humiliating urination. Abandoned by her mother and violated by her stepfamily, Shinsei's mental state deteriorates. However, in her heart, no matter how terrible things are done to her, she endures, saying, "I am different from my mother. I won't run away." Where will the fate of the insane family lead...?
