Yuu, a private tutor, lives with Chika, her former student who is now a college student. Lately, Yuu feels Chika has been distancing herself, making her anxious that Chika's feelings may have cooled. Worried and desperate to uncover the truth, Yuu contacts a detective agency she found online. There, she meets Akari, the agency's beautiful and ruthless president, and Ryo, her highly capable, composed subordinate—infamously known as the "Breakup Specialist." As hidden motives and schemes unfold, emotional conflicts and physical desires intertwine. The deep bonds unique to women, along with endless pleasure, set the stage for the awakening desires of these four women.