"Kuroi-kun, would you like to go out with me on a date?" Kuroi Kengou, the Wakagashira of the Kuroguro gang, has a childhood friend named Shirakaba Touma who has been with him since birth. Shirakaba often visits Kuroi and flirts with him whenever he has free time. In a bold move to win Kuroi's heart, Shirakaba even got married for a month. Despite Shirakaba's persistent love, Kuroi tolerates it, and the men of the Kuroguro group watch over their relationship with warmth. One day, Shirakaba surprises everyone by announcing that he has accepted the position of the Kuroguro gang's legal advisor, which leads to a tense situation between the two men.