Rei enjoys a comfortable marriage with her kind husband, but hates living with his crude, insensitive father, whose verbal and sexual harassment never stops. One day the father-in-law finds her asleep while his son is away, secretly pulls aside her underwear, assaults her, and creampies her without mercy. After that, he keeps waiting for moments when she is vulnerable, repeatedly violating her young adult body in this dark non-consensual role-play.