Raised by overbearing ambitious parents with morally grey personalities, Deki, pursues her success ferociously, doing whatever it takes to achieve her goals as long as it doesn't cost anyone their lives because that is where she draws the line. However, what Deki doesn't know is how thin these lines are. They are so blurred and almost invincible that by the time you cross it, you may not even know. When Misan got into a relationship, he had hoped for the love and attention he never got from the orphanage. Though being with an ambitious person isn't easy, Misan found ways to make sure they were both happy in the relationship but when Deki's obsession with success started to lead her down the same lines she vowed not to cross, he had to help her keep her eyes open. But would he be able to save her from ruining herself? would Deki be able to ensure she has it all? The man she loved, the job she was obsessed with, and her deteriorating health. What if she crosses the line and is never able to find her way back?