[Ishino Kanon] Jewel Knight Princess Lena (Haiboku Heroine Kaizou Choukyou Inferno)

Princess Lena, a jewel knight of the Anti-Imperial Alliance, falls into the hands of a masked enemy who has waited since the Battle of Vega to break her — and he's rebuilt himself with a bio-part just for the occasion. Bound and overwhelmed by mechanical tentacles, the proud princess endures forced climaxes, deep internal violation, and humiliating toys while soldiers look on, her royal defiance slowly drowning in forced pleasure. By the end, her body is rewired into a living power core, her climaxing form fueling an energy cannon aimed at her own army base.