hoohttp://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_171849/

DMM summary:
Theodora, a female warrior, is forced to wear a ring that prevents her from reaching her full potential as she takes on the arena. Naturally, there's no way she can win, and every time she fights, she's raped by her opponents' monsters!

Under the influence of the cursed ring, Theodora is even defeated by a small fish monster, Slime.
Theodora is defeated by a small monster slime due to the effects of the cursed ring, and she is raped hole after hole by the slime's viscous body!

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