S's younger sister, Karin, and M older sister, Princess Natsu. This is the story of two sisters who have different mothers but get along well. One day, it was discovered that the man Karin loved was secretly training her to be a sex slave! Karin, who cried out of jealousy and humiliation, set up a terrible lesbian training! Two people who continue to devour forbidden pleasures while drifting between perversion and love and hate. Tears turn into love, anger into pleasure, and jealousy into love.
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