The live-action adaptation of a masterpiece doujinshi with over 60,000 downloads, which became a super hot topic on SNS, has been realized. A bittersweet erotic drama depicting the pure love between a sister and brother. The older sister, who used to be active, suddenly became a truant and changed. Seeing his helpless older sister, the younger brother gives her a certain role. That was to have sex with her younger brother. Before long, the brother and sister begin to nurture a forbidden love for each other…