Ruri Anno stars in Heroine Beautiful Flesh Experimentation Lab, a restraint-themed special effects and fighting genre release from GIGA. Third-generation Pink Ranger Natsuko Mizushima, a member of the elite task force Perfect Rangers tasked with protecting Earth, falls victim to a cunning trap set by Satan Cross. When she regains consciousness, her wrists and ankles are bound, completely immobilized. Seizing the opportunity, Doctor Mephisto and his combat troops, under orders from Schwarzen Kreutz, begin conducting experiments on her. Trembling in fear and anxiety, Pink endures the torment with fierce mental resilience. The experiment's objective: to test the capabilities of the Perfect Suit. While highly resistant to strong impacts, the suit is vulnerable to subtle stimuli. Under relentless assault from Mephisto and the soldiers, Pink gradually loses consciousness, yet cannot suppress her body's involuntary reactions, succumbing to overwhelming sexual sensations.