Michael was late coming back from Hogwarts. Professor McGonagall... no Headmistress McGonagall... had been hinting at him that she needed a Arithmancy teacher, and while part of him didn't mind the idea at all, he rather thought Anthony might. He'd been stalling giving her an answer, and stalling talking to Anthony about it, and she'd launched into telling him how she'd need to start looking for a new teacher soon if she were ever going to find a suitable candidate... which made him feel guilty.
He flashed Anthony a smile as he entered, and then spotted Justin and Morag at the bar. "I dunno about that," he said as he sat next to Justin, "plain and ordinary Justin doesn't live above the Hogs Head and get roaring drunk every night." Which was certainly an overstatement. None of them got roaring drunk every night, but he couldn't pass up the chance to tease him.