From Futekiya:
Ayumu Satou, a bartender at Bar Crisis, hates how full-fledged adults suddenly lose all decency. A stickler for structure and following rules, Ayumu is not the typical 20- year-old college student. During his usual shift one day, a new face walks through the door, Yoshitaka Bandou. Immediately enticed, Ayumu tends to the new customer. Meeting a mischievous and devilish Yoshitaka, Ayumu becomes further intrigued. Upon the manager's return to the bar, the mood changes, and suddenly, Ayumu is left alone in the dark. What are they exactly? What is going on under the table? And why does Ayumu want to know more?