Miyawaki Sakura moves to the university's dorm after her parents were promoted and transferred for work. She is excited that she'll live in the same dorm as the daughter of her father's fellow CEO and campus crush Matsui Jurina, also known as the "White Devil" and the "Red Ace." But what she was excited about the most was that she'll also live with another campus crush who is a candidate to her heart. Her name was Lee Kaeun, the "Black Angel" and the "Black Ace."

A story about family, especially on four sisters trying to stop the wedding of their youngest sister. As they interact through that issue, they face their deepest problems and deepest secrets that they've kept for a very long time.

A one-shot of freelancers facing love when the other half cannot bear being separated from the other.

A lot has happened before the show for the centers Lee Kaeun and Miyawaki Sakura. Circumstances were cruel and they were not destined to be in the same path. But was that really true when they meet each other at another event?