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Hatsumi Narita, a shy and timid high school girl, lives in a company housing complex where social hierarchy dictates daily life, ruled by the domineering Mrs. Tachibana. When Hatsumi's younger sister, Akane, fears she might be pregnant, Hatsumi is sent to buy a pregnancy test, only to be caught by Ryoki Tachibana, the arrogant son of the powerful Tachibana family. Threatening to expose her family's secret, Ryoki blackmails Hatsumi into becoming his "slave," pulling her into a web of power dynamics and conflicting emotions. As she navigates her feelings, childhood friend Azusa and protective brother Shinogu complicate matters, forcing Hatsumi to confront her own desires and the cost of loyalty.
