Alpha Goto has long been disillusioned with a society that persecutes omegas, and after a devastating past relationship, he has given up on love entirely. One evening on his way home, he stumbles upon an alpha harassing an omega named Ao, and despite his weariness, he intervenes and rescues him. Ao has been surviving by selling his body, with no one to rely on and a deep, aching need to be loved. Learning of Ao's circumstances, Goto reluctantly agrees to let him stay at his apartment during a long vacation, setting the stage for an unlikely cohabitation between an alpha who has lost faith in love and an omega who desperately seeks it.

Goto carries the heavy scars of his past. He was once in a loving relationship with another omega named Kaname, and they had promised to become mates. But Kaname encountered his destined partner and, unable to resist the biological pull, repeatedly betrayed Goto physically while still professing his love emotionally. The contradiction destroyed their bond, and after Goto spoke harsh words to him, Kaname took his own life. The guilt and grief have haunted Goto ever since, making him wary of opening his heart again.

Ao, meanwhile, has his own traumatic history. He was frequently bought by alphas at a facility in the past, and when he later encounters one of those alphas again, he impulsively claims Goto is his lover to escape the situation. This forces him to confess the painful details of his past to Goto. As Ao begins to experience genuine kindness from Goto and witnesses the affectionate bond between Goto's colleague Kawashima and his mate Yuki, he starts to yearn for a real, loving relationship.

When Ao's heat approaches, Goto volunteers to see him through it. The experience is unexpectedly tender and brings them closer than ever. Ao confesses his desire to become Goto's lover, but Goto hesitates, tormented by the fear of losing someone he loves again. A reencounter with the alpha who took Kaname away further destabilizes Goto, triggering possessive and controlling behavior born from his deep-seated terror of abandonment. Ao struggles to reach Goto, wanting to share his burdens but unsure how to help without causing more pain.

Eventually, with patience and unwavering devotion, Ao helps Goto confront his guilt and accept that he deserves happiness. Goto gradually allows himself to heal, and the two formally become mates. Their journey culminates in a fully bonded, loving relationship, with Goto's long-stopped heart finally beginning to move again and Ao finding the unconditional love he had always sought.