At work, Mitsuki Hanamura and Chiaki Saikawa are called the "Saikawa Married Couple," constantly teased for being like spouses with how well they work in sync. Despite playing along with their coworkers' well-intentioned teasing, the two 29-year-olds have always insisted the nature of their relationship is completely platonic. But behind closed doors, it is a whole different story. In reality, Mitsuki and Chiaki have been lawfully married for the past seven years, and a small lie told in the past has now snowballed into one not worth correcting anymore. Chiaki may be sweet and kind at work, but under the sheets lies a monster who likes to penetrate his prey's every defense. These are the circumstances of the Saikawa Married Couple—seven years being methodically trained to love one another—mind, body, and all. [Written by MAL Rewrite]