The work I watched this time is a shocking piece depicting the sisters—the caring older sister Yui and the docile, easily influenced younger sister Karin—being brainwashed by their wealthy stepfather. The story unfolds with the stepfather's attitude drastically changing during their mother's hospitalization, as he approaches them with赤裸 desire, initiating a domination that cleverly exploits their personality differences. The younger sister is seduced with smooth talk, while the older sister is forcibly impregnated, a contrasting approach realistically portrayed through the actresses' skills, making it highly engaging. Particularly, the combination of Kaho Kitaoka's cuteness and Yui Tenma's sexiness creates a synergistic effect, with the threesome scene driving excitement to its peak. As the brainwashing progresses, the scene where the two compete to perform oral on the stepfather's penis conveys a maddening heat that leaves one breathless. Although some note that in the series' third installment, the stepfather role changed to Ippei Nakata, giving a rougher feel and diluting the abnormal flavor, the eroticism of the brainwashing process through money and power remains strong, showcasing the true abilities of the Kikatan actresses. Overall, it's a work that shines with the actresses' beauty and skillful brainwashing depiction, worth watching even for non-fans.