Episodes:
Saya and Hinata share a complex bond as stepsisters whose parents remarried, but behind closed doors, they harbor a deeply hidden, intensely private romantic relationship. However, their secluded sanctuary quickly unravels into a psychological nightmare when Tachikawa—a manipulative and calculated member of the school’s photography club—accidentally discovers their massive secret.
Armed with undeniable photographic evidence, Tachikawa initiates a ruthless, high-stakes blackmail scheme. He targets the innocent younger sister, Hinata, first—utilizing intense emotional coercion and absolute physical dominance to overpower her defenses, systematically capturing her vulnerability to forge a brand-new set of psychological chains.
Deeply alarmed and desperate to protect her younger sibling, Saya bravely steps into the antagonist’s domain to confront him. However, her rescue attempt swiftly backfires, leaving her hopelessly entangled in the exact same whirlwind of absolute control and manipulation, rewriting their domestic reality into an inescapable emotional ordeal.
