MFYD-116 "Human experimentation at an illegal training gym..." Married female investigator Futaba Otani is injected with an aphrodisiac and driven to the brink of collapse after being repeatedly fucked.

"This looks like it's going to be a tough case..." The suspicious death of her husband, ruled as death from overwork—investigator Futaba is convinced her husband was murdered and resigns from her job to infiltrate the suspicious training gym "THE PIT" as a trainer. As she continues her undercover investigation, she uncovers the true nature of THE PIT... it's a human experimentation facility that turns athletes into soldiers! Her husband was "Subject 18"...