GVG-339 Compliant stepmother Aimi Yoshikawa gets raped by her lewd brother and sister

A brother and sister who lived under the control of their violent father. - One day, a new mother, Aimi, comes to the two of them. - In contrast to her domineering father, Aimi has an innocent and fragile appearance. - She immediately notices the strangeness in her new home and cares for her siblings, but her feelings are taken advantage of and she ends up falling into the cunning trap of her unfaithful siblings...