https://www.dlsite.com/maniax/work/=/product_id/RJ01318168.html
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_564888/

[Synopsis]

In a time of hostility between humans and demons, the veteran captain of the royal guard, Elise, was on guard during a demonic invasion.
She finally managed to destroy the orc camp but a vicious high orc appeared who was different from the others.
The female knight fought back but was easily choked and had her voluptuous limbs played with at will.
Exposed to the miasma emanating from the demon's bodily fluids, her body was transformed into an increasingly lascivious state and her precious knight armor was treated like an erotic costume,
causing her to climax repeatedly as her dignity was violated.
Will she be able to return safely from this predicament...?!

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