Three years ago, Surithae lost her beloved sister, the only person who truly understood her. Since then, she has changed from a lively, cheerful girl to someone distant and cold. Now under the care of Yothasira, a strong-willed CEO, Surithae resists the woman who promised to look after her. Looking after Surithae quickly becomes a constant challenge for Yothasira. Wanting to help her change, Yothasira decides to take action. She brings in Phasuk, a new personal secretary, to keep an eye on the stubborn young woman. Quiet, dependable, and far more patient than most people, Phasuk gradually integrates herself into Surithae's life, motivated by a desire to help her heal. But somewhere along the way, Phasuk finds herself gravitating towards Yothasira - the woman who stands behind everything. Silent admiration then turned to strong devotion. At the same time, another story was bound to unfold when Phasuk's younger brother, Kritsada, witnessed the vulnerability that is hidden deep inside Surithae. His initial curiosity shifts into a protective instinct as he recognizes her pain, a feeling that draws them closer in ways neither can deny. Amid old wounds, jealousy, and hidden feelings, four lives tangle in a story about healing-discovering that sometimes, the safest place is under another's protection.

"If you've always felt like a supporting character in someone else's story, this is your moment." Have you ever wondered what the world was like for the second male leads? Do their stories simply end once they've fulfilled their roles, when they've seen the two leads end up together? Or did it simply end when everyone around them had their happy endings? Is that all? The thought had crossed Thanakorn Prasertkul's mind countless times. He believed he was destined to be just a forgotten secondary character in Chantira Simueang's story. The cancellation of their six-year-long engagement was the biggest proof of that. 'Perhaps this is all I'm destined for.' Those were the words he thought before the world had finally heard his cries and granted him the greatest blessing that would pull him out of his misery. And that blessing was calling him now. "Mister..."