USBA-086 - Special investigator tight binding masochism training, falling into the mire of decoy investigation and losing oneself to the pleasure of ropes. Undercover bunny investigator, Hanamiya Kyoko.

What lies behind the smile, a mission or corruption!? The warmth of entangled ropes transforms into forbidden pleasure! “Darkness lurks behind the dazzling neon. On the surface, it's a high-class lounge 'Bunny Castle'. But in reality, it was a base for human trafficking. Kyoko, a female investigator, infiltrated the shop as a rookie bunny. She smiles skillfully, but tension and danger cross in the depths of her heart. Who can she trust, and where are the enemies? Kyoko, who has stepped into the luxurious night world, quietly breaks her sanity.”