http://www.dlsite.com/ecchi-eng/work/=/product_id/RE196230.html

An original doujinshi where a younger brother uses his elder
sister's skin to have sex and live out his transsexual fantasies.

I'd love to see this translated.

Base +10, ccbb +7, Violastrings +6, RigenZ +6

Seems comfy.

Base +7

who is in control there, its the sister dead?

Base +6, namenameha -6

seems the sister is mostly in control, since in the first page she enveloped him

Base +6, RigenZ +6, namenameha -6

https://www.pixiv.net/member_illust.php?mode=medium&illust_id=61902471

Base +33, ccbb +7

On p.21 He say sorry to his sister not to turn her back at the moment.
Brother still in control

Base +7, ccbb +7

Does it mean that by opening the threads on her back, he is in control, and when her sister open the threads from the front and 'eat' him, she is in control?

Looking forward for her to get her revenge on her brother!

Thanks @ccbb

Base +6, ccbb +7, namenameha +6

To be honest, this is great.

Base +5

The brother is always the one in control when he's inside her, even the first time. He says he find that humiliating but he can't stop masturbating when he's inside her.
However, she's still conscious and takes more pleasure when her brother is the one in control as she says "it is even better than doing it myself" page 6.

Base +4