Her husband collapsed, leaving his wife Ryoka at a loss. Her stepson Kazuyuki returned home upon hearing the news. Having grown into a full adult, Kazuyuki reminded Ryoka of her fallen husband, and she leaned on him out of loneliness. However, Kazuyuki, who had always harbored feelings for Ryoka, took advantage of her weakness and pushed her down, manipulating her body. Despite being forced, Ryoka was tormented by having a relationship with her stepson, but Kazuyuki happily shoved his penis into her mouth…
