In a post-virus world with Alphas, Betas, and Omegas, Alpha Sheng Shaoyou seeks help from HS Group for his father's treatment. At the hospital, he meets Omega Hua Yong, who works for his competitor.

Hua Yong overdoses on pheromones and ends up hospitalized. Shen Wenlang secretly visits him, but the meeting doesn’t go well. After being discharged from the hospital, Sheng Shaoyou takes Hua Yong out for dinner and happens to meet Shen Wenlang, where a conflict breaks out.

While seeking investors for drug research at a club, Sheng Shaoyou meets and helps Hua Yong, who needs money for his sister's medical care. Sheng secretly pays the bills, and they grow closer.

Hua Yong reveals he's limited to intimacy with his marking Alpha, upsetting Sheng Shaoyou. Gao Tu struggles with hidden identity and pheromone issues, found by Shen Wenlang. X Holdings' push leads to business peak.

Hua Yong's true identity as the mastermind behind X Holdings is revealed. The misunderstandings between Shen Wenlang and Gao Tu deepen, and Gao Tu wants to resign. Sheng Shaoyou successfully brings Hua Yong back, and in order to protect him, he decides to go to war with HS Group.

Sheng Shaoyou’s condition worsens after losing control of his pheromones and gets hospitalized. X Holdings invites Shaoyou to a private gathering, but the effects of the pheromones cause him to fall into a coma, which causes chaos.

Gao Tu's suppressant abuse worsens his condition. As Sheng Shaoyou and Hua Yong grow closer, Shaoyou's marking proposal is rejected. Hua Yong disappears, and despite Shaoyou's search efforts, remains missing as his true identity emerges.

The relationship between Hua Yong and Sheng Shaoyou deepens with various acts of service performed by Shaoyou, eventually turning into Hua Yong moving in. Shaoyou realizes that his feelings for Hua Yong go beyond friendship.

Hua Yong deliberately sows discord to help Sheng Shaoyou obtain the targeted drug. Unexpectedly, Hua Yong loses control during her susceptible period, mistaking Sheng Shaoyou for an Omega, leading to an irreparable misunderstanding. Meanwhile, Gao Tu also loses control, which accidentally allows Shen Wenlang to discover his true Omega identity.

Gao Tu hides his Omega status and isolates himself, making Shen Wenlang suspect infidelity. As Sheng Shaoyou and Hua Yong share a tender moment, an earthquake strikes. Hua Yong's powerful protection makes Shaoyou question his Omega nature.

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