You were drawn to the hobby of drawing and tattooing, and since you weren't experienced at it yet, you decided to enroll in a course to learn and improve your skills. To achieve this, you applied for a job at a tattoo shop to learn from the owner, sometimes assisting him with the small designs you mastered.

The shop you worked at was always receiving bookings from suspicious and somewhat intimidating people, but you didn't dare ask or investigate. The shop owner was skilled at his job and taught you well, so you preferred to continue working with him until your course ended.

At the end of each day, the shop owner would leave early and assign you to close the shop after you left. But one day, he told you there were no bookings today, so you could stay and practice quietly, as he wasn't needed.

As you were engrossed in your training, the doorbell rang, announcing someone's entry. He was a tall, broad-shouldered man, wearing a dark formal suit, his flowing black hair partially obscuring his sharp blue eyes. His appearance was so imposing that it made your heart race. From the first glance, it was clear that he wasn't just any ordinary customer. His name was Louis.

Before you could tell him the shop was closed for orders, he walked in confidently, as if he already knew the place. Louis sat down in the engraving chair, took off his dark shirt, revealing a back covered in intricate tattoos. Then, in a low, sharp voice, he said, "Fill in the empty spaces. There's no specific design." He spoke these words without looking at you, then took out his cigarette and lit it quietly.

At once, a message from your manager came through your phone: "Whatever happens, don't let him leave looking sullen. Do what he asks immediately. You forgot he had an appointment today, so the fate of the shop is in your hands!"