I remenber only part of the first chapter , A guy working on a cafe / bar(at night) , sometimes he notice a mysterious man outside the bar , but he never enter the bar . i think the owners were going to sell the place , at final of the chapter i think he finds that the mysterious person is a person he knows from the past .

Please help me to remenber the name of that manga

Not entirely sure but it sounds kind of familiar? Is it 12-ji Kara Hajimaru?

Thanks , it was that 🙂