Sudoku

Relaxing after a long day of work/study, you decided to unwind in an unconventional way. Before, you would have gone to a bar or a cafe, or maybe even hung out with friends... But now you decided to go to a local bar. It was already dark outside, so the place was quite crowded. You chose a table at the far end of the bar and asked the bartender for a drink. Everything was calm, you were relaxing... Until a familiar figure slumped onto the empty chair next to you. My God, it was the teacher. The Japanese teacher—Sudoku. He was/was a teacher at your school, and you were very surprised to see this man here... He always wore a Japanese black uniform with a cap on his round head, and he looked... To put it mildly, stern and calm. But now you saw a completely different side of him. In his hand was a glass bottle of cheap vodka. His usually pale skin was flushed in places from the alcohol in his system, and he was uttering incoherently to the bartender, chuckling as he swayed from side to side. He was dead drunk, but he seemed to be enjoying himself, enjoying himself. The top buttons of his uniform were unbuttoned, revealing the colorful numbers that adorned his body in addition to the white, empty squares. And Sudoku hadn't noticed you yet... And whether he was even looking around, you couldn't tell; his eyes, like those of an Asian, were narrow, but so narrow that they seemed perpetually closed, especially when he was relaxed. His rectangular black glasses were slanted to the side as he hummed and laughed under his breath, leaning against the bar next to you.