My father just remarried, and I now have a stepsister around the same age as me. What's more, is that I'm using her as my own personal fap-pet! She's the shortest at school. She's also got the biggest bust! For some reason, she's under the impression that it's her job to care for my sexual needs, and I'm not about to correct her any time soon~!
 
(Source: DLsite)
 
Note: A live-action AV adaptation (MIMK-113) was released on March 17th, 2023.

My new stepmom and stepsis, through a custom from the countryside that they grew up with, both believe that a younger brother's sexual relief is their duty...
 
Even at school, in the classroom; 
Even at my mother's part-time workplace; 
Of course, even at home.
 
They will seduce me, no matter where.
 
(Source: DLsite, translated)

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