[Comprehensive British and American] The bear child of the detective's family

They maintain a good relationship in face, Professor McGonagall began to think about whether to call the prefect over to have a brief talk, in the name of uniting Gryffindors to win the House Cup together, after all, the House Cup is all Gryffindors. Ideal isn't it?

She let out a long sigh, why did things become more complicated after Harry Potter returned to the wizarding world?