Ryo Naruse, who is an able attorney that can turn any case in his clients’ favor, takes cases for the disadvantaged and defends them free of charge; therefore, he is called an “angel attorney.” However, it is only superficial. His true self is that of a man who has sacrificed all his life to track down the murderer that killed his dearest younger brother 11 years ago — that is, he is “a cold-blooded revenge seeker, or the Devil King.”

In education, career and appearance... Sumire is perfect, too perfect for even her boyfriend, who summarily dumps her. Also sexually harassed at work, Sumire takes matters into her own hands. Returning home depressed and lonely, she finds a young man, Takeshi, injured inside a cardboard box. She takes him in, but can't get him to leave, so she offers to keep him if he agrees to become her "pet." With nowhere else to go, Takeshi accepts and immediately takes to his new role. While they are cultivating their relationship as "master" and "pet," a man whom Sumire was attracted to a long time ago, returns to Japan. Although he promises to provide her with the perfect life she has always wanted, Sumire finds she can't stop thinking about "Momo." Could she be falling for her pet?

Kasumi is shocked to discover that her older sister’s fiance is the man she first fell in love with five years ago in high school. At the time, he was her high school teacher and ultimately quit his job racked with guilt over their relationship. Kasumi was deeply hurt and struggled for a long time to overcome her sadness. Now the two of them must come to terms with their secret past before the ones they care about in the present are hurt.

As a child, Haru’s parents died in a boating accident and she was put into a foster home with many other children. During that time, she spent many magical moments with her best friend, a boy named Ryo. She was finally adopted but when her adoptive parents pass away she decides to meet with her old friends again. All of them have changed, especially Ryo who aspired to become a boxer but has just become a small time criminal. Their reunion rekindles some of that old magic between them, but something in their past threatens to take their newfound happiness away.