A blackmail sweet room game held in a luxury hotel suite in the city center. The woman invited this time is Rei Kuroshima, a teacher with 2 years of experience. She is highly intellectual, knowledgeable in arts, and trusted by both students and parents. However, she harbors a secret. The only ones who know it are the men waiting in the sweet room. Exploiting her weakness, the cowardly and cunning men blackmail her. To protect her status, she reluctantly obeys. Every time she's called to the room, she's toyed with. No matter how much her body is sacrificed, her heart never yields. That belief is her only way to protect her pride. Yet somehow her heart is shaken, and resisting only makes another personality rise. She has already fallen into masochism...