Phraenarin, a young CEO, was dumped by her long-time lover, causing her to no longer believe in love. However, she had to marry Khemjira, the daughter of her father's close friend, in exchange for the position of company president.

On the day Khemjira was bullied at work, she used her determination to prove herself by doing better at work, which made Khun Rin's cold heart waver without realizing it. Meanwhile, the attendance of Khun Phraenrin's ex-lover made the bride's heart flutter in the middle of the wedding.

It's the wedding night of the newlyweds, Phraenarin and Khemjira. Phraenarin still shows that she is reluctant, but when Khemjira aggressively 'attacks' her, her heart beats erratically.

The relationship has reached a point where it can’t be controlled. The passionate night shared between the two makes the wife’s heart tremble increasingly. Rin, who insists that she will never love, is about to face her true feelings that she can’t control anymore.

Amidst the anxiety in Phraenarin's heart towards Khemjira and the relationship between the two that seemed to be getting better, Phraphai, Khun Rin's ex-lover, has returned. Will the old flame rekindle? Only Khun Rin can ignite it.

Phraenarin learned the truth that Phraphai's lover was none other than Kiri, the man who had been courting her all along. At the same time, Khemjira was bullied and locked in a dark room all alone. So, Phraenarin took it upon herself to solve the problem. Rin's heart and words were weakening more and more each day.

Amidst Khemjira and Phraenarin's suspicions about who locked Khem in the room, the relationship between them began to change. Even though the anxiety began to form in her heart to the point that it was too much to handle, Khun Rin remained stubborn, while Phraphai still came around to Khun Rin, making the puppy's heartache once again.

After Khemjira was injured from being bullied, Phraenarin rushed to see her and was ready to return to the office to announce that Khemjira was her "husband". At the same time, Khun Rin began to express her feelings for Khemjira more clearly and openly. But when Phraphai faced a problem, Khun Rin couldn't stay quiet. She kept treating Khemjira as if she were an outsider in this matter like every time.

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After Rin realizes that Khem is someone she cannot afford to lose from her life, Rin decides to search for Khem before Khem flies abroad. Rin puts aside her pride, searches for Khem, and for the first time, she confesses her love for Khem wholeheartedly for the first time. Will Khem be hard-hearted or soft-hearted, and will she agree to come back? And in the end, will Rin's heart ever be able to love Khem entirely?