I think the manga you're referring to is On Doorstep by CTK/Chongtak. This is the summary:
Jimmy, a small-time thief, is caught pickpocketing by a middle-aged guy named Reese. Instead of handing him over to the police, Reese makes him slog hard for a day at the book store where he works. Wanting to get back at the other man for humiliating him, Ji......
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