YST-287 My brother offered me a cosplay and the ending

The older brother plays mischievous games with his younger sister who is new to cosplay. Use sweet words to get her to cosplay. After I cosplayed, my brother took a photo as a souvenir, but every day in his heat he used that photo to masturbate and until one day when he couldn't stand it anymore, he asked his sister to cosplay so he could look at it and wipe it off. raped his younger sister while the whole family was at work.