Natsuo Takahina is an omega who has spent his life pretending to be a beta, a necessary disguise to protect himself from predatory alphas in a world where such dynamics dictate social hierarchies. While traveling to a job interview, his carefully maintained control shatters as he suddenly goes into heat on the street, leaving him vulnerable and nearly the victim of an attack. He is rescued at the last moment by a pair of elite alpha twins, Yuya and Tomoya, who are from a powerful and affluent family.

In the immediate aftermath, Natsuo finds himself experiencing an intense and undeniable attraction to both brothers, a clear sign that he has encountered his fated mate or mates. The central conflict immediately takes shape around the impossibility of this situation: while the bond is unmistakable, it is unclear whether Natsuo is meant for one twin or both, forcing the three young men into an unconventional and emotionally charged relationship as they navigate their shared destiny.

A year after their fateful meeting, Natsuo and the twins have established a life together as mates, living as a trio. The stability of their bond is tested when they attend the funeral of a mutual acquaintance. There, Natsuo encounters Kazuma, an alpha from his difficult past who now has a pressing request: he asks Natsuo and the twins to temporarily take care of his younger brother, who he suspects is also an omega. As the three take on the role of temporary guardians, the emotional stakes are raised when one of the twins comes to a crushing realization that he may not be Natsuo’s fated mate after all, throwing the foundation of their relationship into doubt.