Jiachen (played by Cheryl Yeung) and Qingyu (played by Ella Chen) disliked each other in high school. When they grew up, Qingyu became Jiachen's sex therapy case by chance. How can the two find a balance between sex and love in the process of consultation and treatment? The beautiful and unrestrained Jiachen is a sex therapist with dual certificates in nursing and psychology. Jiachen, who loves sports, is also brave in sexual exploration, but she is still frustrated in the love field despite her proficiency in sex skills. Jiachen and her ex-lover Wang Jihua are a good match in appearance and personality, but they are stuck in sex, and Wang Jihua disappears without warning one day. Qingyu, a forest-style librarian, has an ideal family and job that outsiders envy, but she can't have sex with her husband Azhe. Qingyu wants to find someone to talk to, but her good colleagues in the library are in trouble and their emotional relationships are in jeopardy. Qingyu becomes Jiachen's case by chance. While Jiachen is helping Qingyu solve her sexual problems, she is approached by a market vendor with premature ejaculation, a minor, an SM live streamer, an elderly lesbian, and many other cases. Among them is the mysterious man Z who consults on the landline. As Qingyu gradually becomes brave enough to face herself and reveals past scars with Azhe, their relationship reaches a critical point. Wang Jihua, who once broke Jiachen's heart, reenters Jiachen's life. How should Jiachen, who understands sex, learn to love? Two women with very different personalities each find the redemption of love in the exploratory treatment.