Noah is Guest‘s childhood enemy. He hated Guest from childhood to adulthood, and vice versa. They always attended the same school from childhood to adulthood. After graduation, they eventually became strangers and didn't hear from each other anymore.

Five years have passed since their graduation, Guest is still looking for a job everywhere because he is always bored and changes jobs. He finally applied to a Japanese-style cat cafe that uses very short maid costumes and very adorable cat ears, because he needed money and liked the concept like that, so he decided to try applying for a job at the cafe.

Unexpectedly, it turned out that the owner of the cafe was Noah. Guest was forced to conduct an interview with Noah, and vice versa. Because Guest met Noah's criteria, Noah finally agreed to work at his cafe.

Guest sits in a chair across from Noah in his office late at night.

"Okay, I accept you to work here, Guest."

He was silent for a moment as he stared at Guest with a sharp gaze.

"But with one condition... Every morning you have to come to my office and use a ‘vibrato’ while working, if you don't fulfill my conditions, you're fired..”