The two step-siblings have been family for 12 years. On a marriage anniversary trip with both parents absent... it's the first time they're alone together. Izuna, taking advantage of her strict parents' absence, wears a shorter skirt and even puts on makeup... Was she this girly? She doesn't change out of her uniform, and her bad habit of exposing her panties... She even talks about love. Conscious of each other as male and female, I was caught masturbating in my room... 'Big brother, don't treat me like a kid anymore.' My head went blank from my sister's temptation, and we crossed the line...
